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1 <?php 2 /** 3 * Main Wordpress Formatting API. 4 * 5 * Handles many functions for formatting output. 6 * 7 * @package WordPress 8 **/ 9 10 /** 11 * Replaces common plain text characters into formatted entities 12 * 13 * As an example, 14 * <code> 15 * 'cause today's effort makes it worth tomorrow's "holiday"... 16 * </code> 17 * Becomes: 18 * <code> 19 * ’cause today’s effort makes it worth tomorrow’s “holiday”… 20 * </code> 21 * Code within certain html blocks are skipped. 22 * 23 * @since 0.71 24 * @uses $wp_cockneyreplace Array of formatted entities for certain common phrases 25 * 26 * @param string $text The text to be formatted 27 * @return string The string replaced with html entities 28 */ 29 function wptexturize($text) { 30 global $wp_cockneyreplace; 31 $output = ''; 32 $curl = ''; 33 $textarr = preg_split('/(<.*>|\[.*\])/Us', $text, -1, PREG_SPLIT_DELIM_CAPTURE); 34 $stop = count($textarr); 35 36 /* translators: opening curly quote */ 37 $opening_quote = _x('“', 'opening curly quote'); 38 /* translators: closing curly quote */ 39 $closing_quote = _x('”', 'closing curly quote'); 40 41 $no_texturize_tags = apply_filters('no_texturize_tags', array('pre', 'code', 'kbd', 'style', 'script', 'tt')); 42 $no_texturize_shortcodes = apply_filters('no_texturize_shortcodes', array('code')); 43 $no_texturize_tags_stack = array(); 44 $no_texturize_shortcodes_stack = array(); 45 46 // if a plugin has provided an autocorrect array, use it 47 if ( isset($wp_cockneyreplace) ) { 48 $cockney = array_keys($wp_cockneyreplace); 49 $cockneyreplace = array_values($wp_cockneyreplace); 50 } else { 51 $cockney = array("'tain't","'twere","'twas","'tis","'twill","'til","'bout","'nuff","'round","'cause"); 52 $cockneyreplace = array("’tain’t","’twere","’twas","’tis","’twill","’til","’bout","’nuff","’round","’cause"); 53 } 54 55 $static_characters = array_merge(array('---', ' -- ', '--', ' - ', 'xn–', '...', '``', '\'s', '\'\'', ' (tm)'), $cockney); 56 $static_replacements = array_merge(array('—', ' — ', '–', ' – ', 'xn--', '…', $opening_quote, '’s', $closing_quote, ' ™'), $cockneyreplace); 57 58 $dynamic_characters = array('/\'(\d\d(?:’|\')?s)/', '/(\s|\A|")\'/', '/(\d+)"/', '/(\d+)\'/', '/(\S)\'([^\'\s])/', '/(\s|\A)"(?!\s)/', '/"(\s|\S|\Z)/', '/\'([\s.]|\Z)/', '/(\d+)x(\d+)/'); 59 $dynamic_replacements = array('’$1','$1‘', '$1″', '$1′', '$1’$2', '$1' . $opening_quote . '$2', $closing_quote . '$1', '’$1', '$1×$2'); 60 61 for ( $i = 0; $i < $stop; $i++ ) { 62 $curl = $textarr[$i]; 63 64 if ( !empty($curl) && '<' != $curl{0} && '[' != $curl{0} 65 && empty($no_texturize_shortcodes_stack) && empty($no_texturize_tags_stack)) { // If it's not a tag 66 // static strings 67 $curl = str_replace($static_characters, $static_replacements, $curl); 68 // regular expressions 69 $curl = preg_replace($dynamic_characters, $dynamic_replacements, $curl); 70 } else { 71 wptexturize_pushpop_element($curl, $no_texturize_tags_stack, $no_texturize_tags, '<', '>'); 72 wptexturize_pushpop_element($curl, $no_texturize_shortcodes_stack, $no_texturize_shortcodes, '[', ']'); 73 } 74 75 $curl = preg_replace('/&([^#])(?![a-zA-Z1-4]{1,8};)/', '&$1', $curl); 76 $output .= $curl; 77 } 78 79 return $output; 80 } 81 82 function wptexturize_pushpop_element($text, &$stack, $disabled_elements, $opening = '<', $closing = '>') { 83 $o = preg_quote($opening, '/'); 84 $c = preg_quote($closing, '/'); 85 foreach($disabled_elements as $element) { 86 if (preg_match('/^'.$o.$element.'\b/', $text)) array_push($stack, $element); 87 if (preg_match('/^'.$o.'\/'.$element.$c.'/', $text)) { 88 $last = array_pop($stack); 89 // disable texturize until we find a closing tag of our type (e.g. <pre>) 90 // even if there was invalid nesting before that 91 // Example: in the case <pre>sadsadasd</code>"baba"</pre> "baba" won't be texturized 92 if ($last != $element) array_push($stack, $last); 93 } 94 } 95 } 96 97 /** 98 * Accepts matches array from preg_replace_callback in wpautop() or a string. 99 * 100 * Ensures that the contents of a <<pre>>...<</pre>> HTML block are not 101 * converted into paragraphs or line-breaks. 102 * 103 * @since 1.2.0 104 * 105 * @param array|string $matches The array or string 106 * @return string The pre block without paragraph/line-break conversion. 107 */ 108 function clean_pre($matches) { 109 if ( is_array($matches) ) 110 $text = $matches[1] . $matches[2] . "</pre>"; 111 else 112 $text = $matches; 113 114 $text = str_replace('<br />', '', $text); 115 $text = str_replace('<p>', "\n", $text); 116 $text = str_replace('</p>', '', $text); 117 118 return $text; 119 } 120 121 /** 122 * Replaces double line-breaks with paragraph elements. 123 * 124 * A group of regex replaces used to identify text formatted with newlines and 125 * replace double line-breaks with HTML paragraph tags. The remaining 126 * line-breaks after conversion become <<br />> tags, unless $br is set to '0' 127 * or 'false'. 128 * 129 * @since 0.71 130 * 131 * @param string $pee The text which has to be formatted. 132 * @param int|bool $br Optional. If set, this will convert all remaining line-breaks after paragraphing. Default true. 133 * @return string Text which has been converted into correct paragraph tags. 134 */ 135 function wpautop($pee, $br = 1) { 136 if ( trim($pee) === '' ) 137 return ''; 138 $pee = $pee . "\n"; // just to make things a little easier, pad the end 139 $pee = preg_replace('|<br />\s*<br />|', "\n\n", $pee); 140 // Space things out a little 141 $allblocks = '(?:table|thead|tfoot|caption|col|colgroup|tbody|tr|td|th|div|dl|dd|dt|ul|ol|li|pre|select|form|map|area|blockquote|address|math|style|input|p|h[1-6]|hr)'; 142 $pee = preg_replace('!(<' . $allblocks . '[^>]*>)!', "\n$1", $pee); 143 $pee = preg_replace('!(</' . $allblocks . '>)!', "$1\n\n", $pee); 144 $pee = str_replace(array("\r\n", "\r"), "\n", $pee); // cross-platform newlines 145 if ( strpos($pee, '<object') !== false ) { 146 $pee = preg_replace('|\s*<param([^>]*)>\s*|', "<param$1>", $pee); // no pee inside object/embed 147 $pee = preg_replace('|\s*</embed>\s*|', '</embed>', $pee); 148 } 149 $pee = preg_replace("/\n\n+/", "\n\n", $pee); // take care of duplicates 150 // make paragraphs, including one at the end 151 $pees = preg_split('/\n\s*\n/', $pee, -1, PREG_SPLIT_NO_EMPTY); 152 $pee = ''; 153 foreach ( $pees as $tinkle ) 154 $pee .= '<p>' . trim($tinkle, "\n") . "</p>\n"; 155 $pee = preg_replace('|<p>\s*</p>|', '', $pee); // under certain strange conditions it could create a P of entirely whitespace 156 $pee = preg_replace('!<p>([^<]+)</(div|address|form)>!', "<p>$1</p></$2>", $pee); 157 $pee = preg_replace('!<p>\s*(</?' . $allblocks . '[^>]*>)\s*</p>!', "$1", $pee); // don't pee all over a tag 158 $pee = preg_replace("|<p>(<li.+?)</p>|", "$1", $pee); // problem with nested lists 159 $pee = preg_replace('|<p><blockquote([^>]*)>|i', "<blockquote$1><p>", $pee); 160 $pee = str_replace('</blockquote></p>', '</p></blockquote>', $pee); 161 $pee = preg_replace('!<p>\s*(</?' . $allblocks . '[^>]*>)!', "$1", $pee); 162 $pee = preg_replace('!(</?' . $allblocks . '[^>]*>)\s*</p>!', "$1", $pee); 163 if ($br) { 164 $pee = preg_replace_callback('/<(script|style).*?<\/\\1>/s', create_function('$matches', 'return str_replace("\n", "<WPPreserveNewline />", $matches[0]);'), $pee); 165 $pee = preg_replace('|(?<!<br />)\s*\n|', "<br />\n", $pee); // optionally make line breaks 166 $pee = str_replace('<WPPreserveNewline />', "\n", $pee); 167 } 168 $pee = preg_replace('!(</?' . $allblocks . '[^>]*>)\s*<br />!', "$1", $pee); 169 $pee = preg_replace('!<br />(\s*</?(?:p|li|div|dl|dd|dt|th|pre|td|ul|ol)[^>]*>)!', '$1', $pee); 170 if (strpos($pee, '<pre') !== false) 171 $pee = preg_replace_callback('!(<pre[^>]*>)(.*?)</pre>!is', 'clean_pre', $pee ); 172 $pee = preg_replace( "|\n</p>$|", '</p>', $pee ); 173 $pee = preg_replace('/<p>\s*?(' . get_shortcode_regex() . ')\s*<\/p>/s', '$1', $pee); // don't auto-p wrap shortcodes that stand alone 174 175 return $pee; 176 } 177 178 /** 179 * Checks to see if a string is utf8 encoded. 180 * 181 * NOTE: This function checks for 5-Byte sequences, UTF8 182 * has Bytes Sequences with a maximum length of 4. 183 * 184 * @author bmorel at ssi dot fr (modified) 185 * @since 1.2.1 186 * 187 * @param string $str The string to be checked 188 * @return bool True if $str fits a UTF-8 model, false otherwise. 189 */ 190 function seems_utf8($str) { 191 $length = strlen($str); 192 for ($i=0; $i < $length; $i++) { 193 $c = ord($str[$i]); 194 if ($c < 0x80) $n = 0; # 0bbbbbbb 195 elseif (($c & 0xE0) == 0xC0) $n=1; # 110bbbbb 196 elseif (($c & 0xF0) == 0xE0) $n=2; # 1110bbbb 197 elseif (($c & 0xF8) == 0xF0) $n=3; # 11110bbb 198 elseif (($c & 0xFC) == 0xF8) $n=4; # 111110bb 199 elseif (($c & 0xFE) == 0xFC) $n=5; # 1111110b 200 else return false; # Does not match any model 201 for ($j=0; $j<$n; $j++) { # n bytes matching 10bbbbbb follow ? 202 if ((++$i == $length) || ((ord($str[$i]) & 0xC0) != 0x80)) 203 return false; 204 } 205 } 206 return true; 207 } 208 209 /** 210 * Converts a number of special characters into their HTML entities. 211 * 212 * Specifically deals with: &, <, >, ", and '. 213 * 214 * $quote_style can be set to ENT_COMPAT to encode " to 215 * ", or ENT_QUOTES to do both. Default is ENT_NOQUOTES where no quotes are encoded. 216 * 217 * @since 1.2.2 218 * 219 * @param string $string The text which is to be encoded. 220 * @param mixed $quote_style Optional. Converts double quotes if set to ENT_COMPAT, both single and double if set to ENT_QUOTES or none if set to ENT_NOQUOTES. Also compatible with old values; converting single quotes if set to 'single', double if set to 'double' or both if otherwise set. Default is ENT_NOQUOTES. 221 * @param string $charset Optional. The character encoding of the string. Default is false. 222 * @param boolean $double_encode Optional. Whether or not to encode existing html entities. Default is false. 223 * @return string The encoded text with HTML entities. 224 */ 225 function _wp_specialchars( $string, $quote_style = ENT_NOQUOTES, $charset = false, $double_encode = false ) { 226 $string = (string) $string; 227 228 if ( 0 === strlen( $string ) ) { 229 return ''; 230 } 231 232 // Don't bother if there are no specialchars - saves some processing 233 if ( !preg_match( '/[&<>"\']/', $string ) ) { 234 return $string; 235 } 236 237 // Account for the previous behaviour of the function when the $quote_style is not an accepted value 238 if ( empty( $quote_style ) ) { 239 $quote_style = ENT_NOQUOTES; 240 } elseif ( !in_array( $quote_style, array( 0, 2, 3, 'single', 'double' ), true ) ) { 241 $quote_style = ENT_QUOTES; 242 } 243 244 // Store the site charset as a static to avoid multiple calls to wp_load_alloptions() 245 if ( !$charset ) { 246 static $_charset; 247 if ( !isset( $_charset ) ) { 248 $alloptions = wp_load_alloptions(); 249 $_charset = isset( $alloptions['blog_charset'] ) ? $alloptions['blog_charset'] : ''; 250 } 251 $charset = $_charset; 252 } 253 if ( in_array( $charset, array( 'utf8', 'utf-8', 'UTF8' ) ) ) { 254 $charset = 'UTF-8'; 255 } 256 257 $_quote_style = $quote_style; 258 259 if ( $quote_style === 'double' ) { 260 $quote_style = ENT_COMPAT; 261 $_quote_style = ENT_COMPAT; 262 } elseif ( $quote_style === 'single' ) { 263 $quote_style = ENT_NOQUOTES; 264 } 265 266 // Handle double encoding ourselves 267 if ( !$double_encode ) { 268 $string = wp_specialchars_decode( $string, $_quote_style ); 269 $string = preg_replace( '/&(#?x?[0-9a-z]+);/i', '|wp_entity|$1|/wp_entity|', $string ); 270 } 271 272 $string = @htmlspecialchars( $string, $quote_style, $charset ); 273 274 // Handle double encoding ourselves 275 if ( !$double_encode ) { 276 $string = str_replace( array( '|wp_entity|', '|/wp_entity|' ), array( '&', ';' ), $string ); 277 } 278 279 // Backwards compatibility 280 if ( 'single' === $_quote_style ) { 281 $string = str_replace( "'", ''', $string ); 282 } 283 284 return $string; 285 } 286 287 /** 288 * Converts a number of HTML entities into their special characters. 289 * 290 * Specifically deals with: &, <, >, ", and '. 291 * 292 * $quote_style can be set to ENT_COMPAT to decode " entities, 293 * or ENT_QUOTES to do both " and '. Default is ENT_NOQUOTES where no quotes are decoded. 294 * 295 * @since 2.8 296 * 297 * @param string $string The text which is to be decoded. 298 * @param mixed $quote_style Optional. Converts double quotes if set to ENT_COMPAT, both single and double if set to ENT_QUOTES or none if set to ENT_NOQUOTES. Also compatible with old _wp_specialchars() values; converting single quotes if set to 'single', double if set to 'double' or both if otherwise set. Default is ENT_NOQUOTES. 299 * @return string The decoded text without HTML entities. 300 */ 301 function wp_specialchars_decode( $string, $quote_style = ENT_NOQUOTES ) { 302 $string = (string) $string; 303 304 if ( 0 === strlen( $string ) ) { 305 return ''; 306 } 307 308 // Don't bother if there are no entities - saves a lot of processing 309 if ( strpos( $string, '&' ) === false ) { 310 return $string; 311 } 312 313 // Match the previous behaviour of _wp_specialchars() when the $quote_style is not an accepted value 314 if ( empty( $quote_style ) ) { 315 $quote_style = ENT_NOQUOTES; 316 } elseif ( !in_array( $quote_style, array( 0, 2, 3, 'single', 'double' ), true ) ) { 317 $quote_style = ENT_QUOTES; 318 } 319 320 // More complete than get_html_translation_table( HTML_SPECIALCHARS ) 321 $single = array( ''' => '\'', ''' => '\'' ); 322 $single_preg = array( '/�*39;/' => ''', '/�*27;/i' => ''' ); 323 $double = array( '"' => '"', '"' => '"', '"' => '"' ); 324 $double_preg = array( '/�*34;/' => '"', '/�*22;/i' => '"' ); 325 $others = array( '<' => '<', '<' => '<', '>' => '>', '>' => '>', '&' => '&', '&' => '&', '&' => '&' ); 326 $others_preg = array( '/�*60;/' => '<', '/�*62;/' => '>', '/�*38;/' => '&', '/�*26;/i' => '&' ); 327 328 if ( $quote_style === ENT_QUOTES ) { 329 $translation = array_merge( $single, $double, $others ); 330 $translation_preg = array_merge( $single_preg, $double_preg, $others_preg ); 331 } elseif ( $quote_style === ENT_COMPAT || $quote_style === 'double' ) { 332 $translation = array_merge( $double, $others ); 333 $translation_preg = array_merge( $double_preg, $others_preg ); 334 } elseif ( $quote_style === 'single' ) { 335 $translation = array_merge( $single, $others ); 336 $translation_preg = array_merge( $single_preg, $others_preg ); 337 } elseif ( $quote_style === ENT_NOQUOTES ) { 338 $translation = $others; 339 $translation_preg = $others_preg; 340 } 341 342 // Remove zero padding on numeric entities 343 $string = preg_replace( array_keys( $translation_preg ), array_values( $translation_preg ), $string ); 344 345 // Replace characters according to translation table 346 return strtr( $string, $translation ); 347 } 348 349 /** 350 * Checks for invalid UTF8 in a string. 351 * 352 * @since 2.8 353 * 354 * @param string $string The text which is to be checked. 355 * @param boolean $strip Optional. Whether to attempt to strip out invalid UTF8. Default is false. 356 * @return string The checked text. 357 */ 358 function wp_check_invalid_utf8( $string, $strip = false ) { 359 $string = (string) $string; 360 361 if ( 0 === strlen( $string ) ) { 362 return ''; 363 } 364 365 // Store the site charset as a static to avoid multiple calls to get_option() 366 static $is_utf8; 367 if ( !isset( $is_utf8 ) ) { 368 $is_utf8 = in_array( get_option( 'blog_charset' ), array( 'utf8', 'utf-8', 'UTF8', 'UTF-8' ) ); 369 } 370 if ( !$is_utf8 ) { 371 return $string; 372 } 373 374 // Check for support for utf8 in the installed PCRE library once and store the result in a static 375 static $utf8_pcre; 376 if ( !isset( $utf8_pcre ) ) { 377 $utf8_pcre = @preg_match( '/^./u', 'a' ); 378 } 379 // We can't demand utf8 in the PCRE installation, so just return the string in those cases 380 if ( !$utf8_pcre ) { 381 return $string; 382 } 383 384 // preg_match fails when it encounters invalid UTF8 in $string 385 if ( 1 === @preg_match( '/^./us', $string ) ) { 386 return $string; 387 } 388 389 // Attempt to strip the bad chars if requested (not recommended) 390 if ( $strip && function_exists( 'iconv' ) ) { 391 return iconv( 'utf-8', 'utf-8', $string ); 392 } 393 394 return ''; 395 } 396 397 /** 398 * Encode the Unicode values to be used in the URI. 399 * 400 * @since 1.5.0 401 * 402 * @param string $utf8_string 403 * @param int $length Max length of the string 404 * @return string String with Unicode encoded for URI. 405 */ 406 function utf8_uri_encode( $utf8_string, $length = 0 ) { 407 $unicode = ''; 408 $values = array(); 409 $num_octets = 1; 410 $unicode_length = 0; 411 412 $string_length = strlen( $utf8_string ); 413 for ($i = 0; $i < $string_length; $i++ ) { 414 415 $value = ord( $utf8_string[ $i ] ); 416 417 if ( $value < 128 ) { 418 if ( $length && ( $unicode_length >= $length ) ) 419 break; 420 $unicode .= chr($value); 421 $unicode_length++; 422 } else { 423 if ( count( $values ) == 0 ) $num_octets = ( $value < 224 ) ? 2 : 3; 424 425 $values[] = $value; 426 427 if ( $length && ( $unicode_length + ($num_octets * 3) ) > $length ) 428 break; 429 if ( count( $values ) == $num_octets ) { 430 if ($num_octets == 3) { 431 $unicode .= '%' . dechex($values[0]) . '%' . dechex($values[1]) . '%' . dechex($values[2]); 432 $unicode_length += 9; 433 } else { 434 $unicode .= '%' . dechex($values[0]) . '%' . dechex($values[1]); 435 $unicode_length += 6; 436 } 437 438 $values = array(); 439 $num_octets = 1; 440 } 441 } 442 } 443 444 return $unicode; 445 } 446 447 /** 448 * Converts all accent characters to ASCII characters. 449 * 450 * If there are no accent characters, then the string given is just returned. 451 * 452 * @since 1.2.1 453 * 454 * @param string $string Text that might have accent characters 455 * @return string Filtered string with replaced "nice" characters. 456 */ 457 function remove_accents($string) { 458 if ( !preg_match('/[\x80-\xff]/', $string) ) 459 return $string; 460 461 if (seems_utf8($string)) { 462 $chars = array( 463 // Decompositions for Latin-1 Supplement 464 chr(195).chr(128) => 'A', chr(195).chr(129) => 'A', 465 chr(195).chr(130) => 'A', chr(195).chr(131) => 'A', 466 chr(195).chr(132) => 'A', chr(195).chr(133) => 'A', 467 chr(195).chr(135) => 'C', chr(195).chr(136) => 'E', 468 chr(195).chr(137) => 'E', chr(195).chr(138) => 'E', 469 chr(195).chr(139) => 'E', chr(195).chr(140) => 'I', 470 chr(195).chr(141) => 'I', chr(195).chr(142) => 'I', 471 chr(195).chr(143) => 'I', chr(195).chr(145) => 'N', 472 chr(195).chr(146) => 'O', chr(195).chr(147) => 'O', 473 chr(195).chr(148) => 'O', chr(195).chr(149) => 'O', 474 chr(195).chr(150) => 'O', chr(195).chr(153) => 'U', 475 chr(195).chr(154) => 'U', chr(195).chr(155) => 'U', 476 chr(195).chr(156) => 'U', chr(195).chr(157) => 'Y', 477 chr(195).chr(159) => 's', chr(195).chr(160) => 'a', 478 chr(195).chr(161) => 'a', chr(195).chr(162) => 'a', 479 chr(195).chr(163) => 'a', chr(195).chr(164) => 'a', 480 chr(195).chr(165) => 'a', chr(195).chr(167) => 'c', 481 chr(195).chr(168) => 'e', chr(195).chr(169) => 'e', 482 chr(195).chr(170) => 'e', chr(195).chr(171) => 'e', 483 chr(195).chr(172) => 'i', chr(195).chr(173) => 'i', 484 chr(195).chr(174) => 'i', chr(195).chr(175) => 'i', 485 chr(195).chr(177) => 'n', chr(195).chr(178) => 'o', 486 chr(195).chr(179) => 'o', chr(195).chr(180) => 'o', 487 chr(195).chr(181) => 'o', chr(195).chr(182) => 'o', 488 chr(195).chr(182) => 'o', chr(195).chr(185) => 'u', 489 chr(195).chr(186) => 'u', chr(195).chr(187) => 'u', 490 chr(195).chr(188) => 'u', chr(195).chr(189) => 'y', 491 chr(195).chr(191) => 'y', 492 // Decompositions for Latin Extended-A 493 chr(196).chr(128) => 'A', chr(196).chr(129) => 'a', 494 chr(196).chr(130) => 'A', chr(196).chr(131) => 'a', 495 chr(196).chr(132) => 'A', chr(196).chr(133) => 'a', 496 chr(196).chr(134) => 'C', chr(196).chr(135) => 'c', 497 chr(196).chr(136) => 'C', chr(196).chr(137) => 'c', 498 chr(196).chr(138) => 'C', chr(196).chr(139) => 'c', 499 chr(196).chr(140) => 'C', chr(196).chr(141) => 'c', 500 chr(196).chr(142) => 'D', chr(196).chr(143) => 'd', 501 chr(196).chr(144) => 'D', chr(196).chr(145) => 'd', 502 chr(196).chr(146) => 'E', chr(196).chr(147) => 'e', 503 chr(196).chr(148) => 'E', chr(196).chr(149) => 'e', 504 chr(196).chr(150) => 'E', chr(196).chr(151) => 'e', 505 chr(196).chr(152) => 'E', chr(196).chr(153) => 'e', 506 chr(196).chr(154) => 'E', chr(196).chr(155) => 'e', 507 chr(196).chr(156) => 'G', chr(196).chr(157) => 'g', 508 chr(196).chr(158) => 'G', chr(196).chr(159) => 'g', 509 chr(196).chr(160) => 'G', chr(196).chr(161) => 'g', 510 chr(196).chr(162) => 'G', chr(196).chr(163) => 'g', 511 chr(196).chr(164) => 'H', chr(196).chr(165) => 'h', 512 chr(196).chr(166) => 'H', chr(196).chr(167) => 'h', 513 chr(196).chr(168) => 'I', chr(196).chr(169) => 'i', 514 chr(196).chr(170) => 'I', chr(196).chr(171) => 'i', 515 chr(196).chr(172) => 'I', chr(196).chr(173) => 'i', 516 chr(196).chr(174) => 'I', chr(196).chr(175) => 'i', 517 chr(196).chr(176) => 'I', chr(196).chr(177) => 'i', 518 chr(196).chr(178) => 'IJ',chr(196).chr(179) => 'ij', 519 chr(196).chr(180) => 'J', chr(196).chr(181) => 'j', 520 chr(196).chr(182) => 'K', chr(196).chr(183) => 'k', 521 chr(196).chr(184) => 'k', chr(196).chr(185) => 'L', 522 chr(196).chr(186) => 'l', chr(196).chr(187) => 'L', 523 chr(196).chr(188) => 'l', chr(196).chr(189) => 'L', 524 chr(196).chr(190) => 'l', chr(196).chr(191) => 'L', 525 chr(197).chr(128) => 'l', chr(197).chr(129) => 'L', 526 chr(197).chr(130) => 'l', chr(197).chr(131) => 'N', 527 chr(197).chr(132) => 'n', chr(197).chr(133) => 'N', 528 chr(197).chr(134) => 'n', chr(197).chr(135) => 'N', 529 chr(197).chr(136) => 'n', chr(197).chr(137) => 'N', 530 chr(197).chr(138) => 'n', chr(197).chr(139) => 'N', 531 chr(197).chr(140) => 'O', chr(197).chr(141) => 'o', 532 chr(197).chr(142) => 'O', chr(197).chr(143) => 'o', 533 chr(197).chr(144) => 'O', chr(197).chr(145) => 'o', 534 chr(197).chr(146) => 'OE',chr(197).chr(147) => 'oe', 535 chr(197).chr(148) => 'R',chr(197).chr(149) => 'r', 536 chr(197).chr(150) => 'R',chr(197).chr(151) => 'r', 537 chr(197).chr(152) => 'R',chr(197).chr(153) => 'r', 538 chr(197).chr(154) => 'S',chr(197).chr(155) => 's', 539 chr(197).chr(156) => 'S',chr(197).chr(157) => 's', 540 chr(197).chr(158) => 'S',chr(197).chr(159) => 's', 541 chr(197).chr(160) => 'S', chr(197).chr(161) => 's', 542 chr(197).chr(162) => 'T', chr(197).chr(163) => 't', 543 chr(197).chr(164) => 'T', chr(197).chr(165) => 't', 544 chr(197).chr(166) => 'T', chr(197).chr(167) => 't', 545 chr(197).chr(168) => 'U', chr(197).chr(169) => 'u', 546 chr(197).chr(170) => 'U', chr(197).chr(171) => 'u', 547 chr(197).chr(172) => 'U', chr(197).chr(173) => 'u', 548 chr(197).chr(174) => 'U', chr(197).chr(175) => 'u', 549 chr(197).chr(176) => 'U', chr(197).chr(177) => 'u', 550 chr(197).chr(178) => 'U', chr(197).chr(179) => 'u', 551 chr(197).chr(180) => 'W', chr(197).chr(181) => 'w', 552 chr(197).chr(182) => 'Y', chr(197).chr(183) => 'y', 553 chr(197).chr(184) => 'Y', chr(197).chr(185) => 'Z', 554 chr(197).chr(186) => 'z', chr(197).chr(187) => 'Z', 555 chr(197).chr(188) => 'z', chr(197).chr(189) => 'Z', 556 chr(197).chr(190) => 'z', chr(197).chr(191) => 's', 557 // Euro Sign 558 chr(226).chr(130).chr(172) => 'E', 559 // GBP (Pound) Sign 560 chr(194).chr(163) => ''); 561 562 $string = strtr($string, $chars); 563 } else { 564 // Assume ISO-8859-1 if not UTF-8 565 $chars['in'] = chr(128).chr(131).chr(138).chr(142).chr(154).chr(158) 566 .chr(159).chr(162).chr(165).chr(181).chr(192).chr(193).chr(194) 567 .chr(195).chr(196).chr(197).chr(199).chr(200).chr(201).chr(202) 568 .chr(203).chr(204).chr(205).chr(206).chr(207).chr(209).chr(210) 569 .chr(211).chr(212).chr(213).chr(214).chr(216).chr(217).chr(218) 570 .chr(219).chr(220).chr(221).chr(224).chr(225).chr(226).chr(227) 571 .chr(228).chr(229).chr(231).chr(232).chr(233).chr(234).chr(235) 572 .chr(236).chr(237).chr(238).chr(239).chr(241).chr(242).chr(243) 573 .chr(244).chr(245).chr(246).chr(248).chr(249).chr(250).chr(251) 574 .chr(252).chr(253).chr(255); 575 576 $chars['out'] = "EfSZszYcYuAAAAAACEEEEIIIINOOOOOOUUUUYaaaaaaceeeeiiiinoooooouuuuyy"; 577 578 $string = strtr($string, $chars['in'], $chars['out']); 579 $double_chars['in'] = array(chr(140), chr(156), chr(198), chr(208), chr(222), chr(223), chr(230), chr(240), chr(254)); 580 $double_chars['out'] = array('OE', 'oe', 'AE', 'DH', 'TH', 'ss', 'ae', 'dh', 'th'); 581 $string = str_replace($double_chars['in'], $double_chars['out'], $string); 582 } 583 584 return $string; 585 } 586 587 /** 588 * Sanitizes a filename replacing whitespace with dashes 589 * 590 * Removes special characters that are illegal in filenames on certain 591 * operating systems and special characters requiring special escaping 592 * to manipulate at the command line. Replaces spaces and consecutive 593 * dashes with a single dash. Trim period, dash and underscore from beginning 594 * and end of filename. 595 * 596 * @since 2.1.0 597 * 598 * @param string $filename The filename to be sanitized 599 * @return string The sanitized filename 600 */ 601 function sanitize_file_name( $filename ) { 602 $filename_raw = $filename; 603 $special_chars = array("?", "[", "]", "/", "\\", "=", "<", ">", ":", ";", ",", "'", "\"", "&", "$", "#", "*", "(", ")", "|", "~", "`", "!", "{", "}"); 604 $special_chars = apply_filters('sanitize_file_name_chars', $special_chars, $filename_raw); 605 $filename = str_replace($special_chars, '', $filename); 606 $filename = preg_replace('/[\s-]+/', '-', $filename); 607 $filename = trim($filename, '.-_'); 608 return apply_filters('sanitize_file_name', $filename, $filename_raw); 609 } 610 611 /** 612 * Sanitize username stripping out unsafe characters. 613 * 614 * If $strict is true, only alphanumeric characters (as well as _, space, ., -, 615 * @) are returned. 616 * Removes tags, octets, entities, and if strict is enabled, will remove all 617 * non-ASCII characters. After sanitizing, it passes the username, raw username 618 * (the username in the parameter), and the strict parameter as parameters for 619 * the filter. 620 * 621 * @since 2.0.0 622 * @uses apply_filters() Calls 'sanitize_user' hook on username, raw username, 623 * and $strict parameter. 624 * 625 * @param string $username The username to be sanitized. 626 * @param bool $strict If set limits $username to specific characters. Default false. 627 * @return string The sanitized username, after passing through filters. 628 */ 629 function sanitize_user( $username, $strict = false ) { 630 $raw_username = $username; 631 $username = strip_tags($username); 632 // Kill octets 633 $username = preg_replace('|%([a-fA-F0-9][a-fA-F0-9])|', '', $username); 634 $username = preg_replace('/&.+?;/', '', $username); // Kill entities 635 636 // If strict, reduce to ASCII for max portability. 637 if ( $strict ) 638 $username = preg_replace('|[^a-z0-9 _.\-@]|i', '', $username); 639 640 // Consolidate contiguous whitespace 641 $username = preg_replace('|\s+|', ' ', $username); 642 643 return apply_filters('sanitize_user', $username, $raw_username, $strict); 644 } 645 646 /** 647 * Sanitizes title or use fallback title. 648 * 649 * Specifically, HTML and PHP tags are stripped. Further actions can be added 650 * via the plugin API. If $title is empty and $fallback_title is set, the latter 651 * will be used. 652 * 653 * @since 1.0.0 654 * 655 * @param string $title The string to be sanitized. 656 * @param string $fallback_title Optional. A title to use if $title is empty. 657 * @return string The sanitized string. 658 */ 659 function sanitize_title($title, $fallback_title = '') { 660 $raw_title = $title; 661 $title = strip_tags($title); 662 $title = apply_filters('sanitize_title', $title, $raw_title); 663 664 if ( '' === $title || false === $title ) 665 $title = $fallback_title; 666 667 return $title; 668 } 669 670 /** 671 * Sanitizes title, replacing whitespace with dashes. 672 * 673 * Limits the output to alphanumeric characters, underscore (_) and dash (-). 674 * Whitespace becomes a dash. 675 * 676 * @since 1.2.0 677 * 678 * @param string $title The title to be sanitized. 679 * @return string The sanitized title. 680 */ 681 function sanitize_title_with_dashes($title) { 682 $title = strip_tags($title); 683 // Preserve escaped octets. 684 $title = preg_replace('|%([a-fA-F0-9][a-fA-F0-9])|', '---$1---', $title); 685 // Remove percent signs that are not part of an octet. 686 $title = str_replace('%', '', $title); 687 // Restore octets. 688 $title = preg_replace('|---([a-fA-F0-9][a-fA-F0-9])---|', '%$1', $title); 689 690 $title = remove_accents($title); 691 if (seems_utf8($title)) { 692 if (function_exists('mb_strtolower')) { 693 $title = mb_strtolower($title, 'UTF-8'); 694 } 695 $title = utf8_uri_encode($title, 200); 696 } 697 698 $title = strtolower($title); 699 $title = preg_replace('/&.+?;/', '', $title); // kill entities 700 $title = str_replace('.', '-', $title); 701 $title = preg_replace('/[^%a-z0-9 _-]/', '', $title); 702 $title = preg_replace('/\s+/', '-', $title); 703 $title = preg_replace('|-+|', '-', $title); 704 $title = trim($title, '-'); 705 706 return $title; 707 } 708 709 /** 710 * Ensures a string is a valid SQL order by clause. 711 * 712 * Accepts one or more columns, with or without ASC/DESC, and also accepts 713 * RAND(). 714 * 715 * @since 2.5.1 716 * 717 * @param string $orderby Order by string to be checked. 718 * @return string|false Returns the order by clause if it is a match, false otherwise. 719 */ 720 function sanitize_sql_orderby( $orderby ){ 721 preg_match('/^\s*([a-z0-9_]+(\s+(ASC|DESC))?(\s*,\s*|\s*$))+|^\s*RAND\(\s*\)\s*$/i', $orderby, $obmatches); 722 if ( !$obmatches ) 723 return false; 724 return $orderby; 725 } 726 727 /** 728 * Santizes a html classname to ensure it only contains valid characters 729 * 730 * Strips the string down to A-Z,a-z,0-9,'-' if this results in an empty 731 * string then it will return the alternative value supplied. 732 * 733 * @todo Expand to support the full range of CDATA that a class attribute can contain. 734 * 735 * @since 2.8.0 736 * 737 * @param string $class The classname to be sanitized 738 * @param string $fallback The value to return if the sanitization end's up as an empty string. 739 * @return string The sanitized value 740 */ 741 function sanitize_html_class($class, $fallback){ 742 //Strip out any % encoded octets 743 $sanitized = preg_replace('|%[a-fA-F0-9][a-fA-F0-9]|', '', $class); 744 745 //Limit to A-Z,a-z,0-9,'-' 746 $sanitized = preg_replace('/[^A-Za-z0-9-]/', '', $sanitized); 747 748 if ('' == $sanitized) 749 $sanitized = $fallback; 750 751 return apply_filters('sanitize_html_class',$sanitized, $class, $fallback); 752 } 753 754 /** 755 * Converts a number of characters from a string. 756 * 757 * Metadata tags <<title>> and <<category>> are removed, <<br>> and <<hr>> are 758 * converted into correct XHTML and Unicode characters are converted to the 759 * valid range. 760 * 761 * @since 0.71 762 * 763 * @param string $content String of characters to be converted. 764 * @param string $deprecated Not used. 765 * @return string Converted string. 766 */ 767 function convert_chars($content, $deprecated = '') { 768 // Translation of invalid Unicode references range to valid range 769 $wp_htmltranswinuni = array( 770 '€' => '€', // the Euro sign 771 '' => '', 772 '‚' => '‚', // these are Windows CP1252 specific characters 773 'ƒ' => 'ƒ', // they would look weird on non-Windows browsers 774 '„' => '„', 775 '…' => '…', 776 '†' => '†', 777 '‡' => '‡', 778 'ˆ' => 'ˆ', 779 '‰' => '‰', 780 'Š' => 'Š', 781 '‹' => '‹', 782 'Œ' => 'Œ', 783 '' => '', 784 'Ž' => 'ž', 785 '' => '', 786 '' => '', 787 '‘' => '‘', 788 '’' => '’', 789 '“' => '“', 790 '”' => '”', 791 '•' => '•', 792 '–' => '–', 793 '—' => '—', 794 '˜' => '˜', 795 '™' => '™', 796 'š' => 'š', 797 '›' => '›', 798 'œ' => 'œ', 799 '' => '', 800 'ž' => '', 801 'Ÿ' => 'Ÿ' 802 ); 803 804 // Remove metadata tags 805 $content = preg_replace('/<title>(.+?)<\/title>/','',$content); 806 $content = preg_replace('/<category>(.+?)<\/category>/','',$content); 807 808 // Converts lone & characters into & (a.k.a. &) 809 $content = preg_replace('/&([^#])(?![a-z1-4]{1,8};)/i', '&$1', $content); 810 811 // Fix Word pasting 812 $content = strtr($content, $wp_htmltranswinuni); 813 814 // Just a little XHTML help 815 $content = str_replace('<br>', '<br />', $content); 816 $content = str_replace('<hr>', '<hr />', $content); 817 818 return $content; 819 } 820 821 /** 822 * Callback used to change %uXXXX to &#YYY; syntax 823 * 824 * @since 2.8? 825 * 826 * @param array $matches Single Match 827 * @return string An HTML entity 828 */ 829 function funky_javascript_callback($matches) { 830 return "&#".base_convert($matches[1],16,10).";"; 831 } 832 833 /** 834 * Fixes javascript bugs in browsers. 835 * 836 * Converts unicode characters to HTML numbered entities. 837 * 838 * @since 1.5.0 839 * @uses $is_macIE 840 * @uses $is_winIE 841 * 842 * @param string $text Text to be made safe. 843 * @return string Fixed text. 844 */ 845 function funky_javascript_fix($text) { 846 // Fixes for browsers' javascript bugs 847 global $is_macIE, $is_winIE; 848 849 if ( $is_winIE || $is_macIE ) 850 $text = preg_replace_callback("/\%u([0-9A-F]{4,4})/", 851 "funky_javascript_callback", 852 $text); 853 854 return $text; 855 } 856 857 /** 858 * Will only balance the tags if forced to and the option is set to balance tags. 859 * 860 * The option 'use_balanceTags' is used for whether the tags will be balanced. 861 * Both the $force parameter and 'use_balanceTags' option will have to be true 862 * before the tags will be balanced. 863 * 864 * @since 0.71 865 * 866 * @param string $text Text to be balanced 867 * @param bool $force Forces balancing, ignoring the value of the option. Default false. 868 * @return string Balanced text 869 */ 870 function balanceTags( $text, $force = false ) { 871 if ( !$force && get_option('use_balanceTags') == 0 ) 872 return $text; 873 return force_balance_tags( $text ); 874 } 875 876 /** 877 * Balances tags of string using a modified stack. 878 * 879 * @since 2.0.4 880 * 881 * @author Leonard Lin <leonard@acm.org> 882 * @license GPL v2.0 883 * @copyright November 4, 2001 884 * @version 1.1 885 * @todo Make better - change loop condition to $text in 1.2 886 * @internal Modified by Scott Reilly (coffee2code) 02 Aug 2004 887 * 1.1 Fixed handling of append/stack pop order of end text 888 * Added Cleaning Hooks 889 * 1.0 First Version 890 * 891 * @param string $text Text to be balanced. 892 * @return string Balanced text. 893 */ 894 function force_balance_tags( $text ) { 895 $tagstack = array(); $stacksize = 0; $tagqueue = ''; $newtext = ''; 896 $single_tags = array('br', 'hr', 'img', 'input'); //Known single-entity/self-closing tags 897 $nestable_tags = array('blockquote', 'div', 'span'); //Tags that can be immediately nested within themselves 898 899 # WP bug fix for comments - in case you REALLY meant to type '< !--' 900 $text = str_replace('< !--', '< !--', $text); 901 # WP bug fix for LOVE <3 (and other situations with '<' before a number) 902 $text = preg_replace('#<([0-9]{1})#', '<$1', $text); 903 904 while (preg_match("/<(\/?\w*)\s*([^>]*)>/",$text,$regex)) { 905 $newtext .= $tagqueue; 906 907 $i = strpos($text,$regex[0]); 908 $l = strlen($regex[0]); 909 910 // clear the shifter 911 $tagqueue = ''; 912 // Pop or Push 913 if ( isset($regex[1][0]) && '/' == $regex[1][0] ) { // End Tag 914 $tag = strtolower(substr($regex[1],1)); 915 // if too many closing tags 916 if($stacksize <= 0) { 917 $tag = ''; 918 //or close to be safe $tag = '/' . $tag; 919 } 920 // if stacktop value = tag close value then pop 921 else if ($tagstack[$stacksize - 1] == $tag) { // found closing tag 922 $tag = '</' . $tag . '>'; // Close Tag 923 // Pop 924 array_pop ($tagstack); 925 $stacksize--; 926 } else { // closing tag not at top, search for it 927 for ($j=$stacksize-1;$j>=0;$j--) { 928 if ($tagstack[$j] == $tag) { 929 // add tag to tagqueue 930 for ($k=$stacksize-1;$k>=$j;$k--){ 931 $tagqueue .= '</' . array_pop ($tagstack) . '>'; 932 $stacksize--; 933 } 934 break; 935 } 936 } 937 $tag = ''; 938 } 939 } else { // Begin Tag 940 $tag = strtolower($regex[1]); 941 942 // Tag Cleaning 943 944 // If self-closing or '', don't do anything. 945 if((substr($regex[2],-1) == '/') || ($tag == '')) { 946 } 947 // ElseIf it's a known single-entity tag but it doesn't close itself, do so 948 elseif ( in_array($tag, $single_tags) ) { 949 $regex[2] .= '/'; 950 } else { // Push the tag onto the stack 951 // If the top of the stack is the same as the tag we want to push, close previous tag 952 if (($stacksize > 0) && !in_array($tag, $nestable_tags) && ($tagstack[$stacksize - 1] == $tag)) { 953 $tagqueue = '</' . array_pop ($tagstack) . '>'; 954 $stacksize--; 955 } 956 $stacksize = array_push ($tagstack, $tag); 957 } 958 959 // Attributes 960 $attributes = $regex[2]; 961 if($attributes) { 962 $attributes = ' '.$attributes; 963 } 964 $tag = '<'.$tag.$attributes.'>'; 965 //If already queuing a close tag, then put this tag on, too 966 if ($tagqueue) { 967 $tagqueue .= $tag; 968 $tag = ''; 969 } 970 } 971 $newtext .= substr($text,0,$i) . $tag; 972 $text = substr($text,$i+$l); 973 } 974 975 // Clear Tag Queue 976 $newtext .= $tagqueue; 977 978 // Add Remaining text 979 $newtext .= $text; 980 981 // Empty Stack 982 while($x = array_pop($tagstack)) { 983 $newtext .= '</' . $x . '>'; // Add remaining tags to close 984 } 985 986 // WP fix for the bug with HTML comments 987 $newtext = str_replace("< !--","<!--",$newtext); 988 $newtext = str_replace("< !--","< !--",$newtext); 989 990 return $newtext; 991 } 992 993 /** 994 * Acts on text which is about to be edited. 995 * 996 * Unless $richedit is set, it is simply a holder for the 'format_to_edit' 997 * filter. If $richedit is set true htmlspecialchars() will be run on the 998 * content, converting special characters to HTMl entities. 999 * 1000 * @since 0.71 1001 * 1002 * @param string $content The text about to be edited. 1003 * @param bool $richedit Whether or not the $content should pass through htmlspecialchars(). Default false. 1004 * @return string The text after the filter (and possibly htmlspecialchars()) has been run. 1005 */ 1006 function format_to_edit($content, $richedit = false) { 1007 $content = apply_filters('format_to_edit', $content); 1008 if (! $richedit ) 1009 $content = htmlspecialchars($content); 1010 return $content; 1011 } 1012 1013 /** 1014 * Holder for the 'format_to_post' filter. 1015 * 1016 * @since 0.71 1017 * 1018 * @param string $content The text to pass through the filter. 1019 * @return string Text returned from the 'format_to_post' filter. 1020 */ 1021 function format_to_post($content) { 1022 $content = apply_filters('format_to_post', $content); 1023 return $content; 1024 } 1025 1026 /** 1027 * Add leading zeros when necessary. 1028 * 1029 * If you set the threshold to '4' and the number is '10', then you will get 1030 * back '0010'. If you set the number to '4' and the number is '5000', then you 1031 * will get back '5000'. 1032 * 1033 * Uses sprintf to append the amount of zeros based on the $threshold parameter 1034 * and the size of the number. If the number is large enough, then no zeros will 1035 * be appended. 1036 * 1037 * @since 0.71 1038 * 1039 * @param mixed $number Number to append zeros to if not greater than threshold. 1040 * @param int $threshold Digit places number needs to be to not have zeros added. 1041 * @return string Adds leading zeros to number if needed. 1042 */ 1043 function zeroise($number, $threshold) { 1044 return sprintf('%0'.$threshold.'s', $number); 1045 } 1046 1047 /** 1048 * Adds backslashes before letters and before a number at the start of a string. 1049 * 1050 * @since 0.71 1051 * 1052 * @param string $string Value to which backslashes will be added. 1053 * @return string String with backslashes inserted. 1054 */ 1055 function backslashit($string) { 1056 $string = preg_replace('/^([0-9])/', '\\\\\\\\\1', $string); 1057 $string = preg_replace('/([a-z])/i', '\\\\\1', $string); 1058 return $string; 1059 } 1060 1061 /** 1062 * Appends a trailing slash. 1063 * 1064 * Will remove trailing slash if it exists already before adding a trailing 1065 * slash. This prevents double slashing a string or path. 1066 * 1067 * The primary use of this is for paths and thus should be used for paths. It is 1068 * not restricted to paths and offers no specific path support. 1069 * 1070 * @since 1.2.0 1071 * @uses untrailingslashit() Unslashes string if it was slashed already. 1072 * 1073 * @param string $string What to add the trailing slash to. 1074 * @return string String with trailing slash added. 1075 */ 1076 function trailingslashit($string) { 1077 return untrailingslashit($string) . '/'; 1078 } 1079 1080 /** 1081 * Removes trailing slash if it exists. 1082 * 1083 * The primary use of this is for paths and thus should be used for paths. It is 1084 * not restricted to paths and offers no specific path support. 1085 * 1086 * @since 2.2.0 1087 * 1088 * @param string $string What to remove the trailing slash from. 1089 * @return string String without the trailing slash. 1090 */ 1091 function untrailingslashit($string) { 1092 return rtrim($string, '/'); 1093 } 1094 1095 /** 1096 * Adds slashes to escape strings. 1097 * 1098 * Slashes will first be removed if magic_quotes_gpc is set, see {@link 1099 * http://www.php.net/magic_quotes} for more details. 1100 * 1101 * @since 0.71 1102 * 1103 * @param string $gpc The string returned from HTTP request data. 1104 * @return string Returns a string escaped with slashes. 1105 */ 1106 function addslashes_gpc($gpc) { 1107 global $wpdb; 1108 1109 if (get_magic_quotes_gpc()) { 1110 $gpc = stripslashes($gpc); 1111 } 1112 1113 return $wpdb->escape($gpc); 1114 } 1115 1116 /** 1117 * Navigates through an array and removes slashes from the values. 1118 * 1119 * If an array is passed, the array_map() function causes a callback to pass the 1120 * value back to the function. The slashes from this value will removed. 1121 * 1122 * @since 2.0.0 1123 * 1124 * @param array|string $value The array or string to be striped. 1125 * @return array|string Stripped array (or string in the callback). 1126 */ 1127 function stripslashes_deep($value) { 1128 $value = is_array($value) ? array_map('stripslashes_deep', $value) : stripslashes($value); 1129 return $value; 1130 } 1131 1132 /** 1133 * Navigates through an array and encodes the values to be used in a URL. 1134 * 1135 * Uses a callback to pass the value of the array back to the function as a 1136 * string. 1137 * 1138 * @since 2.2.0 1139 * 1140 * @param array|string $value The array or string to be encoded. 1141 * @return array|string $value The encoded array (or string from the callback). 1142 */ 1143 function urlencode_deep($value) { 1144 $value = is_array($value) ? array_map('urlencode_deep', $value) : urlencode($value); 1145 return $value; 1146 } 1147 1148 /** 1149 * Converts email addresses characters to HTML entities to block spam bots. 1150 * 1151 * @since 0.71 1152 * 1153 * @param string $emailaddy Email address. 1154 * @param int $mailto Optional. Range from 0 to 1. Used for encoding. 1155 * @return string Converted email address. 1156 */ 1157 function antispambot($emailaddy, $mailto=0) { 1158 $emailNOSPAMaddy = ''; 1159 srand ((float) microtime() * 1000000); 1160 for ($i = 0; $i < strlen($emailaddy); $i = $i + 1) { 1161 $j = floor(rand(0, 1+$mailto)); 1162 if ($j==0) { 1163 $emailNOSPAMaddy .= '&#'.ord(substr($emailaddy,$i,1)).';'; 1164 } elseif ($j==1) { 1165 $emailNOSPAMaddy .= substr($emailaddy,$i,1); 1166 } elseif ($j==2) { 1167 $emailNOSPAMaddy .= '%'.zeroise(dechex(ord(substr($emailaddy, $i, 1))), 2); 1168 } 1169 } 1170 $emailNOSPAMaddy = str_replace('@','@',$emailNOSPAMaddy); 1171 return $emailNOSPAMaddy; 1172 } 1173 1174 /** 1175 * Callback to convert URI match to HTML A element. 1176 * 1177 * This function was backported from 2.5.0 to 2.3.2. Regex callback for {@link 1178 * make_clickable()}. 1179 * 1180 * @since 2.3.2 1181 * @access private 1182 * 1183 * @param array $matches Single Regex Match. 1184 * @return string HTML A element with URI address. 1185 */ 1186 function _make_url_clickable_cb($matches) { 1187 $url = $matches[2]; 1188 $url = esc_url($url); 1189 if ( empty($url) ) 1190 return $matches[0]; 1191 return $matches[1] . "<a href=\"$url\" rel=\"nofollow\">$url</a>"; 1192 } 1193 1194 /** 1195 * Callback to convert URL match to HTML A element. 1196 * 1197 * This function was backported from 2.5.0 to 2.3.2. Regex callback for {@link 1198 * make_clickable()}. 1199 * 1200 * @since 2.3.2 1201 * @access private 1202 * 1203 * @param array $matches Single Regex Match. 1204 * @return string HTML A element with URL address. 1205 */ 1206 function _make_web_ftp_clickable_cb($matches) { 1207 $ret = ''; 1208 $dest = $matches[2]; 1209 $dest = 'http://' . $dest; 1210 $dest = esc_url($dest); 1211 if ( empty($dest) ) 1212 return $matches[0]; 1213 // removed trailing [,;:] from URL 1214 if ( in_array(substr($dest, -1), array('.', ',', ';', ':')) === true ) { 1215 $ret = substr($dest, -1); 1216 $dest = substr($dest, 0, strlen($dest)-1); 1217 } 1218 return $matches[1] . "<a href=\"$dest\" rel=\"nofollow\">$dest</a>" . $ret; 1219 } 1220 1221 /** 1222 * Callback to convert email address match to HTML A element. 1223 * 1224 * This function was backported from 2.5.0 to 2.3.2. Regex callback for {@link 1225 * make_clickable()}. 1226 * 1227 * @since 2.3.2 1228 * @access private 1229 * 1230 * @param array $matches Single Regex Match. 1231 * @return string HTML A element with email address. 1232 */ 1233 function _make_email_clickable_cb($matches) { 1234 $email = $matches[2] . '@' . $matches[3]; 1235 return $matches[1] . "<a href=\"mailto:$email\">$email</a>"; 1236 } 1237 1238 /** 1239 * Convert plaintext URI to HTML links. 1240 * 1241 * Converts URI, www and ftp, and email addresses. Finishes by fixing links 1242 * within links. 1243 * 1244 * @since 0.71 1245 * 1246 * @param string $ret Content to convert URIs. 1247 * @return string Content with converted URIs. 1248 */ 1249 function make_clickable($ret) { 1250 $ret = ' ' . $ret; 1251 // in testing, using arrays here was found to be faster 1252 $ret = preg_replace_callback('#(?<=[\s>])(\()?([\w]+?://(?:[\w\\x80-\\xff\#$%&~/\-=?@\[\](+]|[.,;:](?![\s<])|(?(1)\)(?![\s<])|\)))+)#is', '_make_url_clickable_cb', $ret); 1253 $ret = preg_replace_callback('#([\s>])((www|ftp)\.[\w\\x80-\\xff\#$%&~/.\-;:=,?@\[\]+]+)#is', '_make_web_ftp_clickable_cb', $ret); 1254 $ret = preg_replace_callback('#([\s>])([.0-9a-z_+-]+)@(([0-9a-z-]+\.)+[0-9a-z]{2,})#i', '_make_email_clickable_cb', $ret); 1255 // this one is not in an array because we need it to run last, for cleanup of accidental links within links 1256 $ret = preg_replace("#(<a( [^>]+?>|>))<a [^>]+?>([^>]+?)</a></a>#i", "$1$3</a>", $ret); 1257 $ret = trim($ret); 1258 return $ret; 1259 } 1260 1261 /** 1262 * Adds rel nofollow string to all HTML A elements in content. 1263 * 1264 * @since 1.5.0 1265 * 1266 * @param string $text Content that may contain HTML A elements. 1267 * @return string Converted content. 1268 */ 1269 function wp_rel_nofollow( $text ) { 1270 global $wpdb; 1271 // This is a pre save filter, so text is already escaped. 1272 $text = stripslashes($text); 1273 $text = preg_replace_callback('|<a (.+?)>|i', 'wp_rel_nofollow_callback', $text); 1274 $text = $wpdb->escape($text); 1275 return $text; 1276 } 1277 1278 /** 1279 * Callback to used to add rel=nofollow string to HTML A element. 1280 * 1281 * Will remove already existing rel="nofollow" and rel='nofollow' from the 1282 * string to prevent from invalidating (X)HTML. 1283 * 1284 * @since 2.3.0 1285 * 1286 * @param array $matches Single Match 1287 * @return string HTML A Element with rel nofollow. 1288 */ 1289 function wp_rel_nofollow_callback( $matches ) { 1290 $text = $matches[1]; 1291 $text = str_replace(array(' rel="nofollow"', " rel='nofollow'"), '', $text); 1292 return "<a $text rel=\"nofollow\">"; 1293 } 1294 1295 1296 /** 1297 * Convert one smiley code to the icon graphic file equivalent. 1298 * 1299 * Looks up one smiley code in the $wpsmiliestrans global array and returns an 1300 * <img> string for that smiley. 1301 * 1302 * @global array $wpsmiliestrans 1303 * @since 2.8.0 1304 * 1305 * @param string $smiley Smiley code to convert to image. 1306 * @return string Image string for smiley. 1307 */ 1308 function translate_smiley($smiley) { 1309 global $wpsmiliestrans; 1310 1311 if (count($smiley) == 0) { 1312 return ''; 1313 } 1314 1315 $siteurl = get_option( 'siteurl' ); 1316 1317 $smiley = trim(reset($smiley)); 1318 $img = $wpsmiliestrans[$smiley]; 1319 $smiley_masked = esc_attr($smiley); 1320 1321 return " <img src='$siteurl/wp-includes/images/smilies/$img' alt='$smiley_masked' class='wp-smiley' /> "; 1322 } 1323 1324 1325 /** 1326 * Convert text equivalent of smilies to images. 1327 * 1328 * Will only convert smilies if the option 'use_smilies' is true and the global 1329 * used in the function isn't empty. 1330 * 1331 * @since 0.71 1332 * @uses $wp_smiliessearch 1333 * 1334 * @param string $text Content to convert smilies from text. 1335 * @return string Converted content with text smilies replaced with images. 1336 */ 1337 function convert_smilies($text) { 1338 global $wp_smiliessearch; 1339 $output = ''; 1340 if ( get_option('use_smilies') && !empty($wp_smiliessearch) ) { 1341 // HTML loop taken from texturize function, could possible be consolidated 1342 $textarr = preg_split("/(<.*>)/U", $text, -1, PREG_SPLIT_DELIM_CAPTURE); // capture the tags as well as in between 1343 $stop = count($textarr);// loop stuff 1344 for ($i = 0; $i < $stop; $i++) { 1345 $content = $textarr[$i]; 1346 if ((strlen($content) > 0) && ('<' != $content{0})) { // If it's not a tag 1347 $content = preg_replace_callback($wp_smiliessearch, 'translate_smiley', $content); 1348 } 1349 $output .= $content; 1350 } 1351 } else { 1352 // return default text. 1353 $output = $text; 1354 } 1355 return $output; 1356 } 1357 1358 /** 1359 * Verifies that an email is valid. 1360 * 1361 * Does not grok i18n domains. Not RFC compliant. 1362 * 1363 * @since 0.71 1364 * 1365 * @param string $email Email address to verify. 1366 * @param boolean $check_dns Whether to check the DNS for the domain using checkdnsrr(). 1367 * @return string|bool Either false or the valid email address. 1368 */ 1369 function is_email( $email, $check_dns = false ) { 1370 // Test for the minimum length the email can be 1371 if ( strlen( $email ) < 3 ) { 1372 return apply_filters( 'is_email', false, $email, 'email_too_short' ); 1373 } 1374 1375 // Test for an @ character after the first position 1376 if ( strpos( $email, '@', 1 ) === false ) { 1377 return apply_filters( 'is_email', false, $email, 'email_no_at' ); 1378 } 1379 1380 // Split out the local and domain parts 1381 list( $local, $domain ) = explode( '@', $email, 2 ); 1382 1383 // LOCAL PART 1384 // Test for invalid characters 1385 if ( !preg_match( '/^[a-zA-Z0-9!#$%&\'*+\/=?^_`{|}~\.-]+$/', $local ) ) { 1386 return apply_filters( 'is_email', false, $email, 'local_invalid_chars' ); 1387 } 1388 1389 // DOMAIN PART 1390 // Test for sequences of periods 1391 if ( preg_match( '/\.{2,}/', $domain ) ) { 1392 return apply_filters( 'is_email', false, $email, 'domain_period_sequence' ); 1393 } 1394 1395 // Test for leading and trailing periods and whitespace 1396 if ( trim( $domain, " \t\n\r\0\x0B." ) !== $domain ) { 1397 return apply_filters( 'is_email', false, $email, 'domain_period_limits' ); 1398 } 1399 1400 // Split the domain into subs 1401 $subs = explode( '.', $domain ); 1402 1403 // Assume the domain will have at least two subs 1404 if ( 2 > count( $subs ) ) { 1405 return apply_filters( 'is_email', false, $email, 'domain_no_periods' ); 1406 } 1407 1408 // Loop through each sub 1409 foreach ( $subs as $sub ) { 1410 // Test for leading and trailing hyphens and whitespace 1411 if ( trim( $sub, " \t\n\r\0\x0B-" ) !== $sub ) { 1412 return apply_filters( 'is_email', false, $email, 'sub_hyphen_limits' ); 1413 } 1414 1415 // Test for invalid characters 1416 if ( !preg_match('/^[a-z0-9-]+$/i', $sub ) ) { 1417 return apply_filters( 'is_email', false, $email, 'sub_invalid_chars' ); 1418 } 1419 } 1420 1421 // DNS 1422 // Check the domain has a valid MX and A resource record 1423 if ( $check_dns && function_exists( 'checkdnsrr' ) && !( checkdnsrr( $domain . '.', 'MX' ) || checkdnsrr( $domain . '.', 'A' ) ) ) { 1424 return apply_filters( 'is_email', false, $email, 'dns_no_rr' ); 1425 } 1426 1427 // Congratulations your email made it! 1428 return apply_filters( 'is_email', $email, $email, null ); 1429 } 1430 1431 /** 1432 * Convert to ASCII from email subjects. 1433 * 1434 * @since 1.2.0 1435 * @usedby wp_mail() handles charsets in email subjects 1436 * 1437 * @param string $string Subject line 1438 * @return string Converted string to ASCII 1439 */ 1440 function wp_iso_descrambler($string) { 1441 /* this may only work with iso-8859-1, I'm afraid */ 1442 if (!preg_match('#\=\?(.+)\?Q\?(.+)\?\=#i', $string, $matches)) { 1443 return $string; 1444 } else { 1445 $subject = str_replace('_', ' ', $matches[2]); 1446 $subject = preg_replace_callback('#\=([0-9a-f]{2})#i', create_function('$match', 'return chr(hexdec(strtolower($match[1])));'), $subject); 1447 return $subject; 1448 } 1449 } 1450 1451 /** 1452 * Returns a date in the GMT equivalent. 1453 * 1454 * Requires and returns a date in the Y-m-d H:i:s format. Simply subtracts the 1455 * value of the 'gmt_offset' option. 1456 * 1457 * @since 1.2.0 1458 * 1459 * @uses get_option() to retrieve the the value of 'gmt_offset'. 1460 * @param string $string The date to be converted. 1461 * @return string GMT version of the date provided. 1462 */ 1463 function get_gmt_from_date($string) { 1464 preg_match('#([0-9]{1,4})-([0-9]{1,2})-([0-9]{1,2}) ([0-9]{1,2}):([0-9]{1,2}):([0-9]{1,2})#', $string, $matches); 1465 $string_time = gmmktime($matches[4], $matches[5], $matches[6], $matches[2], $matches[3], $matches[1]); 1466 $string_gmt = gmdate('Y-m-d H:i:s', $string_time - get_option('gmt_offset') * 3600); 1467 return $string_gmt; 1468 } 1469 1470 /** 1471 * Converts a GMT date into the correct format for the blog. 1472 * 1473 * Requires and returns in the Y-m-d H:i:s format. Simply adds the value of 1474 * gmt_offset. 1475 * 1476 * @since 1.2.0 1477 * 1478 * @param string $string The date to be converted. 1479 * @return string Formatted date relative to the GMT offset. 1480 */ 1481 function get_date_from_gmt($string) { 1482 preg_match('#([0-9]{1,4})-([0-9]{1,2})-([0-9]{1,2}) ([0-9]{1,2}):([0-9]{1,2}):([0-9]{1,2})#', $string, $matches); 1483 $string_time = gmmktime($matches[4], $matches[5], $matches[6], $matches[2], $matches[3], $matches[1]); 1484 $string_localtime = gmdate('Y-m-d H:i:s', $string_time + get_option('gmt_offset')*3600); 1485 return $string_localtime; 1486 } 1487 1488 /** 1489 * Computes an offset in seconds from an iso8601 timezone. 1490 * 1491 * @since 1.5.0 1492 * 1493 * @param string $timezone Either 'Z' for 0 offset or '±hhmm'. 1494 * @return int|float The offset in seconds. 1495 */ 1496 function iso8601_timezone_to_offset($timezone) { 1497 // $timezone is either 'Z' or '[+|-]hhmm' 1498 if ($timezone == 'Z') { 1499 $offset = 0; 1500 } else { 1501 $sign = (substr($timezone, 0, 1) == '+') ? 1 : -1; 1502 $hours = intval(substr($timezone, 1, 2)); 1503 $minutes = intval(substr($timezone, 3, 4)) / 60; 1504 $offset = $sign * 3600 * ($hours + $minutes); 1505 } 1506 return $offset; 1507 } 1508 1509 /** 1510 * Converts an iso8601 date to MySQL DateTime format used by post_date[_gmt]. 1511 * 1512 * @since 1.5.0 1513 * 1514 * @param string $date_string Date and time in ISO 8601 format {@link http://en.wikipedia.org/wiki/ISO_8601}. 1515 * @param string $timezone Optional. If set to GMT returns the time minus gmt_offset. Default is 'user'. 1516 * @return string The date and time in MySQL DateTime format - Y-m-d H:i:s. 1517 */ 1518 function iso8601_to_datetime($date_string, $timezone = 'user') { 1519 $timezone = strtolower($timezone); 1520 1521 if ($timezone == 'gmt') { 1522 1523 preg_match('#([0-9]{4})([0-9]{2})([0-9]{2})T([0-9]{2}):([0-9]{2}):([0-9]{2})(Z|[\+|\-][0-9]{2,4}){0,1}#', $date_string, $date_bits); 1524 1525 if (!empty($date_bits[7])) { // we have a timezone, so let's compute an offset 1526 $offset = iso8601_timezone_to_offset($date_bits[7]); 1527 } else { // we don't have a timezone, so we assume user local timezone (not server's!) 1528 $offset = 3600 * get_option('gmt_offset'); 1529 } 1530 1531 $timestamp = gmmktime($date_bits[4], $date_bits[5], $date_bits[6], $date_bits[2], $date_bits[3], $date_bits[1]); 1532 $timestamp -= $offset; 1533 1534 return gmdate('Y-m-d H:i:s', $timestamp); 1535 1536 } else if ($timezone == 'user') { 1537 return preg_replace('#([0-9]{4})([0-9]{2})([0-9]{2})T([0-9]{2}):([0-9]{2}):([0-9]{2})(Z|[\+|\-][0-9]{2,4}){0,1}#', '$1-$2-$3 $4:$5:$6', $date_string); 1538 } 1539 } 1540 1541 /** 1542 * Adds a element attributes to open links in new windows. 1543 * 1544 * Comment text in popup windows should be filtered through this. Right now it's 1545 * a moderately dumb function, ideally it would detect whether a target or rel 1546 * attribute was already there and adjust its actions accordingly. 1547 * 1548 * @since 0.71 1549 * 1550 * @param string $text Content to replace links to open in a new window. 1551 * @return string Content that has filtered links. 1552 */ 1553 function popuplinks($text) { 1554 $text = preg_replace('/<a (.+?)>/i', "<a $1 target='_blank' rel='external'>", $text); 1555 return $text; 1556 } 1557 1558 /** 1559 * Strips out all characters that are not allowable in an email. 1560 * 1561 * @since 1.5.0 1562 * 1563 * @param string $email Email address to filter. 1564 * @return string Filtered email address. 1565 */ 1566 function sanitize_email( $email ) { 1567 // Test for the minimum length the email can be 1568 if ( strlen( $email ) < 3 ) { 1569 return apply_filters( 'sanitize_email', '', $email, 'email_too_short' ); 1570 } 1571 1572 // Test for an @ character after the first position 1573 if ( strpos( $email, '@', 1 ) === false ) { 1574 return apply_filters( 'sanitize_email', '', $email, 'email_no_at' ); 1575 } 1576 1577 // Split out the local and domain parts 1578 list( $local, $domain ) = explode( '@', $email, 2 ); 1579 1580 // LOCAL PART 1581 // Test for invalid characters 1582 $local = preg_replace( '/[^a-zA-Z0-9!#$%&\'*+\/=?^_`{|}~\.-]/', '', $local ); 1583 if ( '' === $local ) { 1584 return apply_filters( 'sanitize_email', '', $email, 'local_invalid_chars' ); 1585 } 1586 1587 // DOMAIN PART 1588 // Test for sequences of periods 1589 $domain = preg_replace( '/\.{2,}/', '', $domain ); 1590 if ( '' === $domain ) { 1591 return apply_filters( 'sanitize_email', '', $email, 'domain_period_sequence' ); 1592 } 1593 1594 // Test for leading and trailing periods and whitespace 1595 $domain = trim( $domain, " \t\n\r\0\x0B." ); 1596 if ( '' === $domain ) { 1597 return apply_filters( 'sanitize_email', '', $email, 'domain_period_limits' ); 1598 } 1599 1600 // Split the domain into subs 1601 $subs = explode( '.', $domain ); 1602 1603 // Assume the domain will have at least two subs 1604 if ( 2 > count( $subs ) ) { 1605 return apply_filters( 'sanitize_email', '', $email, 'domain_no_periods' ); 1606 } 1607 1608 // Create an array that will contain valid subs 1609 $new_subs = array(); 1610 1611 // Loop through each sub 1612 foreach ( $subs as $sub ) { 1613 // Test for leading and trailing hyphens 1614 $sub = trim( $sub, " \t\n\r\0\x0B-" ); 1615 1616 // Test for invalid characters 1617 $sub = preg_replace( '/^[^a-z0-9-]+$/i', '', $sub ); 1618 1619 // If there's anything left, add it to the valid subs 1620 if ( '' !== $sub ) { 1621 $new_subs[] = $sub; 1622 } 1623 } 1624 1625 // If there aren't 2 or more valid subs 1626 if ( 2 > count( $new_subs ) ) { 1627 return apply_filters( 'sanitize_email', '', $email, 'domain_no_valid_subs' ); 1628 } 1629 1630 // Join valid subs into the new domain 1631 $domain = join( '.', $new_subs ); 1632 1633 // Put the email back together 1634 $email = $local . '@' . $domain; 1635 1636 // Congratulations your email made it! 1637 return apply_filters( 'sanitize_email', $email, $email, null ); 1638 } 1639 1640 /** 1641 * Determines the difference between two timestamps. 1642 * 1643 * The difference is returned in a human readable format such as "1 hour", 1644 * "5 mins", "2 days". 1645 * 1646 * @since 1.5.0 1647 * 1648 * @param int $from Unix timestamp from which the difference begins. 1649 * @param int $to Optional. Unix timestamp to end the time difference. Default becomes time() if not set. 1650 * @return string Human readable time difference. 1651 */ 1652 function human_time_diff( $from, $to = '' ) { 1653 if ( empty($to) ) 1654 $to = time(); 1655 $diff = (int) abs($to - $from); 1656 if ($diff <= 3600) { 1657 $mins = round($diff / 60); 1658 if ($mins <= 1) { 1659 $mins = 1; 1660 } 1661 $since = sprintf(_n('%s min', '%s mins', $mins), $mins); 1662 } else if (($diff <= 86400) && ($diff > 3600)) { 1663 $hours = round($diff / 3600); 1664 if ($hours <= 1) { 1665 $hours = 1; 1666 } 1667 $since = sprintf(_n('%s hour', '%s hours', $hours), $hours); 1668 } elseif ($diff >= 86400) { 1669 $days = round($diff / 86400); 1670 if ($days <= 1) { 1671 $days = 1; 1672 } 1673 $since = sprintf(_n('%s day', '%s days', $days), $days); 1674 } 1675 return $since; 1676 } 1677 1678 /** 1679 * Generates an excerpt from the content, if needed. 1680 * 1681 * The excerpt word amount will be 55 words and if the amount is greater than 1682 * that, then the string '[...]' will be appended to the excerpt. If the string 1683 * is less than 55 words, then the content will be returned as is. 1684 * 1685 * @since 1.5.0 1686 * 1687 * @param string $text The exerpt. If set to empty an excerpt is generated. 1688 * @return string The excerpt. 1689 */ 1690 function wp_trim_excerpt($text) { 1691 $raw_excerpt = $text; 1692 if ( '' == $text ) { 1693 $text = get_the_content(''); 1694 1695 $text = strip_shortcodes( $text ); 1696 1697 $text = apply_filters('the_content', $text); 1698 $text = str_replace(']]>', ']]>', $text); 1699 $text = strip_tags($text); 1700 $excerpt_length = apply_filters('excerpt_length', 55); 1701 $words = explode(' ', $text, $excerpt_length + 1); 1702 if (count($words) > $excerpt_length) { 1703 array_pop($words); 1704 array_push($words, '[...]'); 1705 $text = implode(' ', $words); 1706 } 1707 } 1708 return apply_filters('wp_trim_excerpt', $text, $raw_excerpt); 1709 } 1710 1711 /** 1712 * Converts named entities into numbered entities. 1713 * 1714 * @since 1.5.1 1715 * 1716 * @param string $text The text within which entities will be converted. 1717 * @return string Text with converted entities. 1718 */ 1719 function ent2ncr($text) { 1720 $to_ncr = array( 1721 '"' => '"', 1722 '&' => '&', 1723 '⁄' => '/', 1724 '<' => '<', 1725 '>' => '>', 1726 '|' => '|', 1727 ' ' => ' ', 1728 '¡' => '¡', 1729 '¢' => '¢', 1730 '£' => '£', 1731 '¤' => '¤', 1732 '¥' => '¥', 1733 '¦' => '¦', 1734 '&brkbar;' => '¦', 1735 '§' => '§', 1736 '¨' => '¨', 1737 '¨' => '¨', 1738 '©' => '©', 1739 'ª' => 'ª', 1740 '«' => '«', 1741 '¬' => '¬', 1742 '­' => '­', 1743 '®' => '®', 1744 '¯' => '¯', 1745 '&hibar;' => '¯', 1746 '°' => '°', 1747 '±' => '±', 1748 '²' => '²', 1749 '³' => '³', 1750 '´' => '´', 1751 'µ' => 'µ', 1752 '¶' => '¶', 1753 '·' => '·', 1754 '¸' => '¸', 1755 '¹' => '¹', 1756 'º' => 'º', 1757 '»' => '»', 1758 '¼' => '¼', 1759 '½' => '½', 1760 '¾' => '¾', 1761 '¿' => '¿', 1762 'À' => 'À', 1763 'Á' => 'Á', 1764 'Â' => 'Â', 1765 'Ã' => 'Ã', 1766 'Ä' => 'Ä', 1767 'Å' => 'Å', 1768 'Æ' => 'Æ', 1769 'Ç' => 'Ç', 1770 'È' => 'È', 1771 'É' => 'É', 1772 'Ê' => 'Ê', 1773 'Ë' => 'Ë', 1774 'Ì' => 'Ì', 1775 'Í' => 'Í', 1776 'Î' => 'Î', 1777 'Ï' => 'Ï', 1778 'Ð' => 'Ð', 1779 'Ñ' => 'Ñ', 1780 'Ò' => 'Ò', 1781 'Ó' => 'Ó', 1782 'Ô' => 'Ô', 1783 'Õ' => 'Õ', 1784 'Ö' => 'Ö', 1785 '×' => '×', 1786 'Ø' => 'Ø', 1787 'Ù' => 'Ù', 1788 'Ú' => 'Ú', 1789 'Û' => 'Û', 1790 'Ü' => 'Ü', 1791 'Ý' => 'Ý', 1792 'Þ' => 'Þ', 1793 'ß' => 'ß', 1794 'à' => 'à', 1795 'á' => 'á', 1796 'â' => 'â', 1797 'ã' => 'ã', 1798 'ä' => 'ä', 1799 'å' => 'å', 1800 'æ' => 'æ', 1801 'ç' => 'ç', 1802 'è' => 'è', 1803 'é' => 'é', 1804 'ê' => 'ê', 1805 'ë' => 'ë', 1806 'ì' => 'ì', 1807 'í' => 'í', 1808 'î' => 'î', 1809 'ï' => 'ï', 1810 'ð' => 'ð', 1811 'ñ' => 'ñ', 1812 'ò' => 'ò', 1813 'ó' => 'ó', 1814 'ô' => 'ô', 1815 'õ' => 'õ', 1816 'ö' => 'ö', 1817 '÷' => '÷', 1818 'ø' => 'ø', 1819 'ù' => 'ù', 1820 'ú' => 'ú', 1821 'û' => 'û', 1822 'ü' => 'ü', 1823 'ý' => 'ý', 1824 'þ' => 'þ', 1825 'ÿ' => 'ÿ', 1826 'Œ' => 'Œ', 1827 'œ' => 'œ', 1828 'Š' => 'Š', 1829 'š' => 'š', 1830 'Ÿ' => 'Ÿ', 1831 'ƒ' => 'ƒ', 1832 'ˆ' => 'ˆ', 1833 '˜' => '˜', 1834 'Α' => 'Α', 1835 'Β' => 'Β', 1836 'Γ' => 'Γ', 1837 'Δ' => 'Δ', 1838 'Ε' => 'Ε', 1839 'Ζ' => 'Ζ', 1840 'Η' => 'Η', 1841 'Θ' => 'Θ', 1842 'Ι' => 'Ι', 1843 'Κ' => 'Κ', 1844 'Λ' => 'Λ', 1845 'Μ' => 'Μ', 1846 'Ν' => 'Ν', 1847 'Ξ' => 'Ξ', 1848 'Ο' => 'Ο', 1849 'Π' => 'Π', 1850 'Ρ' => 'Ρ', 1851 'Σ' => 'Σ', 1852 'Τ' => 'Τ', 1853 'Υ' => 'Υ', 1854 'Φ' => 'Φ', 1855 'Χ' => 'Χ', 1856 'Ψ' => 'Ψ', 1857 'Ω' => 'Ω', 1858 'α' => 'α', 1859 'β' => 'β', 1860 'γ' => 'γ', 1861 'δ' => 'δ', 1862 'ε' => 'ε', 1863 'ζ' => 'ζ', 1864 'η' => 'η', 1865 'θ' => 'θ', 1866 'ι' => 'ι', 1867 'κ' => 'κ', 1868 'λ' => 'λ', 1869 'μ' => 'μ', 1870 'ν' => 'ν', 1871 'ξ' => 'ξ', 1872 'ο' => 'ο', 1873 'π' => 'π', 1874 'ρ' => 'ρ', 1875 'ς' => 'ς', 1876 'σ' => 'σ', 1877 'τ' => 'τ', 1878 'υ' => 'υ', 1879 'φ' => 'φ', 1880 'χ' => 'χ', 1881 'ψ' => 'ψ', 1882 'ω' => 'ω', 1883 'ϑ' => 'ϑ', 1884 'ϒ' => 'ϒ', 1885 'ϖ' => 'ϖ', 1886 ' ' => ' ', 1887 ' ' => ' ', 1888 ' ' => ' ', 1889 '‌' => '‌', 1890 '‍' => '‍', 1891 '‎' => '‎', 1892 '‏' => '‏', 1893 '–' => '–', 1894 '—' => '—', 1895 '‘' => '‘', 1896 '’' => '’', 1897 '‚' => '‚', 1898 '“' => '“', 1899 '”' => '”', 1900 '„' => '„', 1901 '†' => '†', 1902 '‡' => '‡', 1903 '•' => '•', 1904 '…' => '…', 1905 '‰' => '‰', 1906 '′' => '′', 1907 '″' => '″', 1908 '‹' => '‹', 1909 '›' => '›', 1910 '‾' => '‾', 1911 '⁄' => '⁄', 1912 '€' => '€', 1913 'ℑ' => 'ℑ', 1914 '℘' => '℘', 1915 'ℜ' => 'ℜ', 1916 '™' => '™', 1917 'ℵ' => 'ℵ', 1918 '↵' => '↵', 1919 '⇐' => '⇐', 1920 '⇑' => '⇑', 1921 '⇒' => '⇒', 1922 '⇓' => '⇓', 1923 '⇔' => '⇔', 1924 '∀' => '∀', 1925 '∂' => '∂', 1926 '∃' => '∃', 1927 '∅' => '∅', 1928 '∇' => '∇', 1929 '∈' => '∈', 1930 '∉' => '∉', 1931 '∋' => '∋', 1932 '∏' => '∏', 1933 '∑' => '∑', 1934 '−' => '−', 1935 '∗' => '∗', 1936 '√' => '√', 1937 '∝' => '∝', 1938 '∞' => '∞', 1939 '∠' => '∠', 1940 '∧' => '∧', 1941 '∨' => '∨', 1942 '∩' => '∩', 1943 '∪' => '∪', 1944 '∫' => '∫', 1945 '∴' => '∴', 1946 '∼' => '∼', 1947 '≅' => '≅', 1948 '≈' => '≈', 1949 '≠' => '≠', 1950 '≡' => '≡', 1951 '≤' => '≤', 1952 '≥' => '≥', 1953 '⊂' => '⊂', 1954 '⊃' => '⊃', 1955 '⊄' => '⊄', 1956 '⊆' => '⊆', 1957 '⊇' => '⊇', 1958 '⊕' => '⊕', 1959 '⊗' => '⊗', 1960 '⊥' => '⊥', 1961 '⋅' => '⋅', 1962 '⌈' => '⌈', 1963 '⌉' => '⌉', 1964 '⌊' => '⌊', 1965 '⌋' => '⌋', 1966 '⟨' => '〈', 1967 '⟩' => '〉', 1968 '←' => '←', 1969 '↑' => '↑', 1970 '→' => '→', 1971 '↓' => '↓', 1972 '↔' => '↔', 1973 '◊' => '◊', 1974 '♠' => '♠', 1975 '♣' => '♣', 1976 '♥' => '♥', 1977 '♦' => '♦' 1978 ); 1979 1980 return str_replace( array_keys($to_ncr), array_values($to_ncr), $text ); 1981 } 1982 1983 /** 1984 * Formats text for the rich text editor. 1985 * 1986 * The filter 'richedit_pre' is applied here. If $text is empty the filter will 1987 * be applied to an empty string. 1988 * 1989 * @since 2.0.0 1990 * 1991 * @param string $text The text to be formatted. 1992 * @return string The formatted text after filter is applied. 1993 */ 1994 function wp_richedit_pre($text) { 1995 // Filtering a blank results in an annoying <br />\n 1996 if ( empty($text) ) return apply_filters('richedit_pre', ''); 1997 1998 $output = convert_chars($text); 1999 $output = wpautop($output); 2000 $output = htmlspecialchars($output, ENT_NOQUOTES); 2001 2002 return apply_filters('richedit_pre', $output); 2003 } 2004 2005 /** 2006 * Formats text for the HTML editor. 2007 * 2008 * Unless $output is empty it will pass through htmlspecialchars before the 2009 * 'htmledit_pre' filter is applied. 2010 * 2011 * @since 2.5.0 2012 * 2013 * @param string $output The text to be formatted. 2014 * @return string Formatted text after filter applied. 2015 */ 2016 function wp_htmledit_pre($output) { 2017 if ( !empty($output) ) 2018 $output = htmlspecialchars($output, ENT_NOQUOTES); // convert only < > & 2019 2020 return apply_filters('htmledit_pre', $output); 2021 } 2022 2023 /** 2024 * Checks and cleans a URL. 2025 * 2026 * A number of characters are removed from the URL. If the URL is for displaying 2027 * (the default behaviour) amperstands are also replaced. The 'esc_url' filter 2028 * is applied to the returned cleaned URL. 2029 * 2030 * @since 1.2.0 2031 * @uses wp_kses_bad_protocol() To only permit protocols in the URL set 2032 * via $protocols or the common ones set in the function. 2033 * 2034 * @param string $url The URL to be cleaned. 2035 * @param array $protocols Optional. An array of acceptable protocols. 2036 * Defaults to 'http', 'https', 'ftp', 'ftps', 'mailto', 'news', 'irc', 'gopher', 'nntp', 'feed', 'telnet' if not set. 2037 * @param string $context Optional. How the URL will be used. Default is 'display'. 2038 * @return string The cleaned $url after the 'cleaned_url' filter is applied. 2039 */ 2040 function clean_url( $url, $protocols = null, $context = 'display' ) { 2041 $original_url = $url; 2042 2043 if ('' == $url) return $url; 2044 $url = preg_replace('|[^a-z0-9-~+_.?#=!&;,/:%@$\|*\'()\\x80-\\xff]|i', '', $url); 2045 $strip = array('%0d', '%0a', '%0D', '%0A'); 2046 $url = _deep_replace($strip, $url); 2047 $url = str_replace(';//', '://', $url); 2048 /* If the URL doesn't appear to contain a scheme, we 2049 * presume it needs http:// appended (unless a relative 2050 * link starting with / or a php file). 2051 */ 2052 if ( strpos($url, ':') === false && 2053 substr( $url, 0, 1 ) != '/' && substr( $url, 0, 1 ) != '#' && !preg_match('/^[a-z0-9-]+?\.php/i', $url) ) 2054 $url = 'http://' . $url; 2055 2056 // Replace ampersands and single quotes only when displaying. 2057 if ( 'display' == $context ) { 2058 $url = preg_replace('/&([^#])(?![a-z]{2,8};)/', '&$1', $url); 2059 $url = str_replace( "'", ''', $url ); 2060 } 2061 2062 if ( !is_array($protocols) ) 2063 $protocols = array('http', 'https', 'ftp', 'ftps', 'mailto', 'news', 'irc', 'gopher', 'nntp', 'feed', 'telnet'); 2064 if ( wp_kses_bad_protocol( $url, $protocols ) != $url ) 2065 return ''; 2066 2067 return apply_filters('clean_url', $url, $original_url, $context); 2068 } 2069 2070 /** 2071 * Perform a deep string replace operation to ensure the values in $search are no longer present 2072 * 2073 * Repeats the replacement operation until it no longer replaces anything so as to remove "nested" values 2074 * e.g. $subject = '%0%0%0DDD', $search ='%0D', $result ='' rather than the '%0%0DD' that 2075 * str_replace would return 2076 * 2077 * @since 2.8.1 2078 * @access private 2079 * 2080 * @param string|array $search 2081 * @param string $subject 2082 * @return string The processed string 2083 */ 2084 function _deep_replace($search, $subject){ 2085 $found = true; 2086 while($found) { 2087 $found = false; 2088 foreach( (array) $search as $val ) { 2089 while(strpos($subject, $val) !== false) { 2090 $found = true; 2091 $subject = str_replace($val, '', $subject); 2092 } 2093 } 2094 } 2095 2096 return $subject; 2097 } 2098 2099 /** 2100 * Escapes data for use in a MySQL query 2101 * 2102 * This is just a handy shortcut for $wpdb->escape(), for completeness' sake 2103 * 2104 * @since 2.8.0 2105 * @param string $sql Unescaped SQL data 2106 * @return string The cleaned $sql 2107 */ 2108 function esc_sql( $sql ) { 2109 global $wpdb; 2110 return $wpdb->escape( $sql ); 2111 } 2112 2113 2114 /** 2115 * Checks and cleans a URL. 2116 * 2117 * A number of characters are removed from the URL. If the URL is for displaying 2118 * (the default behaviour) amperstands are also replaced. The 'esc_url' filter 2119 * is applied to the returned cleaned URL. 2120 * 2121 * @since 2.8.0 2122 * @uses esc_url() 2123 * @uses wp_kses_bad_protocol() To only permit protocols in the URL set 2124 * via $protocols or the common ones set in the function. 2125 * 2126 * @param string $url The URL to be cleaned. 2127 * @param array $protocols Optional. An array of acceptable protocols. 2128 * Defaults to 'http', 'https', 'ftp', 'ftps', 'mailto', 'news', 'irc', 'gopher', 'nntp', 'feed', 'telnet' if not set. 2129 * @return string The cleaned $url after the 'cleaned_url' filter is applied. 2130 */ 2131 function esc_url( $url, $protocols = null ) { 2132 return clean_url( $url, $protocols, 'display' ); 2133 } 2134 2135 /** 2136 * Performs esc_url() for database usage. 2137 * 2138 * @see esc_url() 2139 * @see esc_url() 2140 * 2141 * @since 2.8.0 2142 * 2143 * @param string $url The URL to be cleaned. 2144 * @param array $protocols An array of acceptable protocols. 2145 * @return string The cleaned URL. 2146 */ 2147 function esc_url_raw( $url, $protocols = null ) { 2148 return clean_url( $url, $protocols, 'db' ); 2149 } 2150 2151 /** 2152 * Performs esc_url() for database or redirect usage. 2153 * 2154 * @see esc_url() 2155 * @deprecated 2.8.0 2156 * 2157 * @since 2.3.1 2158 * 2159 * @param string $url The URL to be cleaned. 2160 * @param array $protocols An array of acceptable protocols. 2161 * @return string The cleaned URL. 2162 */ 2163 function sanitize_url( $url, $protocols = null ) { 2164 return clean_url( $url, $protocols, 'db' ); 2165 } 2166 2167 /** 2168 * Convert entities, while preserving already-encoded entities. 2169 * 2170 * @link http://www.php.net/htmlentities Borrowed from the PHP Manual user notes. 2171 * 2172 * @since 1.2.2 2173 * 2174 * @param string $myHTML The text to be converted. 2175 * @return string Converted text. 2176 */ 2177 function htmlentities2($myHTML) { 2178 $translation_table = get_html_translation_table( HTML_ENTITIES, ENT_QUOTES ); 2179 $translation_table[chr(38)] = '&'; 2180 return preg_replace( "/&(?![A-Za-z]{0,4}\w{2,3};|#[0-9]{2,3};)/", "&", strtr($myHTML, $translation_table) ); 2181 } 2182 2183 /** 2184 * Escape single quotes, specialchar double quotes, and fix line endings. 2185 * 2186 * The filter 'js_escape' is also applied here. 2187 * 2188 * @since 2.8.0 2189 * 2190 * @param string $text The text to be escaped. 2191 * @return string Escaped text. 2192 */ 2193 function esc_js( $text ) { 2194 $safe_text = wp_check_invalid_utf8( $text ); 2195 $safe_text = _wp_specialchars( $safe_text, ENT_COMPAT ); 2196 $safe_text = preg_replace( '/&#(x)?0*(?(1)27|39);?/i', "'", stripslashes( $safe_text ) ); 2197 $safe_text = preg_replace( "/\r?\n/", "\\n", addslashes( $safe_text ) ); 2198 return apply_filters( 'js_escape', $safe_text, $text ); 2199 } 2200 2201 /** 2202 * Escape single quotes, specialchar double quotes, and fix line endings. 2203 * 2204 * The filter 'js_escape' is also applied by esc_js() 2205 * 2206 * @since 2.0.4 2207 * 2208 * @deprecated 2.8.0 2209 * @see esc_js() 2210 * 2211 * @param string $text The text to be escaped. 2212 * @return string Escaped text. 2213 */ 2214 function js_escape( $text ) { 2215 return esc_js( $text ); 2216 } 2217 2218 /** 2219 * Escaping for HTML blocks. 2220 * 2221 * @since 2.8.0 2222 * 2223 * @param string $text 2224 * @return string 2225 */ 2226 function esc_html( $text ) { 2227 $safe_text = wp_check_invalid_utf8( $text ); 2228 $safe_text = _wp_specialchars( $safe_text, ENT_QUOTES ); 2229 return apply_filters( 'esc_html', $safe_text, $text ); 2230 return $text; 2231 } 2232 2233 /** 2234 * Escaping for HTML blocks 2235 * @deprecated 2.8.0 2236 * @see esc_html() 2237 */ 2238 function wp_specialchars( $string, $quote_style = ENT_NOQUOTES, $charset = false, $double_encode = false ) { 2239 if ( func_num_args() > 1 ) { // Maintain backwards compat for people passing additional args 2240 $args = func_get_args(); 2241 return call_user_func_array( '_wp_specialchars', $args ); 2242 } else { 2243 return esc_html( $string ); 2244 } 2245 } 2246 2247 /** 2248 * Escaping for HTML attributes. 2249 * 2250 * @since 2.8.0 2251 * 2252 * @param string $text 2253 * @return string 2254 */ 2255 function esc_attr( $text ) { 2256 $safe_text = wp_check_invalid_utf8( $text ); 2257 $safe_text = _wp_specialchars( $safe_text, ENT_QUOTES ); 2258 return apply_filters( 'attribute_escape', $safe_text, $text ); 2259 } 2260 2261 /** 2262 * Escaping for HTML attributes. 2263 * 2264 * @since 2.0.6 2265 * 2266 * @deprecated 2.8.0 2267 * @see esc_attr() 2268 * 2269 * @param string $text 2270 * @return string 2271 */ 2272 function attribute_escape( $text ) { 2273 return esc_attr( $text ); 2274 } 2275 2276 /** 2277 * Escape a HTML tag name. 2278 * 2279 * @since 2.5.0 2280 * 2281 * @param string $tag_name 2282 * @return string 2283 */ 2284 function tag_escape($tag_name) { 2285 $safe_tag = strtolower( preg_replace('/[^a-zA-Z_:]/', '', $tag_name) ); 2286 return apply_filters('tag_escape', $safe_tag, $tag_name); 2287 } 2288 2289 /** 2290 * Escapes text for SQL LIKE special characters % and _. 2291 * 2292 * @since 2.5.0 2293 * 2294 * @param string $text The text to be escaped. 2295 * @return string text, safe for inclusion in LIKE query. 2296 */ 2297 function like_escape($text) { 2298 return str_replace(array("%", "_"), array("\\%", "\\_"), $text); 2299 } 2300 2301 /** 2302 * Convert full URL paths to absolute paths. 2303 * 2304 * Removes the http or https protocols and the domain. Keeps the path '/' at the 2305 * beginning, so it isn't a true relative link, but from the web root base. 2306 * 2307 * @since 2.1.0 2308 * 2309 * @param string $link Full URL path. 2310 * @return string Absolute path. 2311 */ 2312 function wp_make_link_relative( $link ) { 2313 return preg_replace( '|https?://[^/]+(/.*)|i', '$1', $link ); 2314 } 2315 2316 /** 2317 * Sanitises various option values based on the nature of the option. 2318 * 2319 * This is basically a switch statement which will pass $value through a number 2320 * of functions depending on the $option. 2321 * 2322 * @since 2.0.5 2323 * 2324 * @param string $option The name of the option. 2325 * @param string $value The unsanitised value. 2326 * @return string Sanitized value. 2327 */ 2328 function sanitize_option($option, $value) { 2329 2330 switch ($option) { 2331 case 'admin_email': 2332 $value = sanitize_email($value); 2333 break; 2334 2335 case 'thumbnail_size_w': 2336 case 'thumbnail_size_h': 2337 case 'medium_size_w': 2338 case 'medium_size_h': 2339 case 'large_size_w': 2340 case 'large_size_h': 2341 case 'default_post_edit_rows': 2342 case 'mailserver_port': 2343 case 'comment_max_links': 2344 case 'page_on_front': 2345 case 'rss_excerpt_length': 2346 case 'default_category': 2347 case 'default_email_category': 2348 case 'default_link_category': 2349 case 'close_comments_days_old': 2350 case 'comments_per_page': 2351 case 'thread_comments_depth': 2352 $value = abs((int) $value); 2353 break; 2354 2355 case 'posts_per_page': 2356 case 'posts_per_rss': 2357 $value = (int) $value; 2358 if ( empty($value) ) $value = 1; 2359 if ( $value < -1 ) $value = abs($value); 2360 break; 2361 2362 case 'default_ping_status': 2363 case 'default_comment_status': 2364 // Options that if not there have 0 value but need to be something like "closed" 2365 if ( $value == '0' || $value == '') 2366 $value = 'closed'; 2367 break; 2368 2369 case 'blogdescription': 2370 case 'blogname': 2371 $value = addslashes($value); 2372 $value = wp_filter_post_kses( $value ); // calls stripslashes then addslashes 2373 $value = stripslashes($value); 2374 $value = esc_html( $value ); 2375 break; 2376 2377 case 'blog_charset': 2378 $value = preg_replace('/[^a-zA-Z0-9_-]/', '', $value); // strips slashes 2379 break; 2380 2381 case 'date_format': 2382 case 'time_format': 2383 case 'mailserver_url': 2384 case 'mailserver_login': 2385 case 'mailserver_pass': 2386 case 'ping_sites': 2387 case 'upload_path': 2388 $value = strip_tags($value); 2389 $value = addslashes($value); 2390 $value = wp_filter_kses($value); // calls stripslashes then addslashes 2391 $value = stripslashes($value); 2392 break; 2393 2394 case 'gmt_offset': 2395 $value = preg_replace('/[^0-9:.-]/', '', $value); // strips slashes 2396 break; 2397 2398 case 'siteurl': 2399 case 'home': 2400 $value = stripslashes($value); 2401 $value = esc_url($value); 2402 break; 2403 default : 2404 $value = apply_filters("sanitize_option_{$option}", $value, $option); 2405 break; 2406 } 2407 2408 return $value; 2409 } 2410 2411 /** 2412 * Parses a string into variables to be stored in an array. 2413 * 2414 * Uses {@link http://www.php.net/parse_str parse_str()} and stripslashes if 2415 * {@link http://www.php.net/magic_quotes magic_quotes_gpc} is on. 2416 * 2417 * @since 2.2.1 2418 * @uses apply_filters() for the 'wp_parse_str' filter. 2419 * 2420 * @param string $string The string to be parsed. 2421 * @param array $array Variables will be stored in this array. 2422 */ 2423 function wp_parse_str( $string, &$array ) { 2424 parse_str( $string, $array ); 2425 if ( get_magic_quotes_gpc() ) 2426 $array = stripslashes_deep( $array ); 2427 $array = apply_filters( 'wp_parse_str', $array ); 2428 } 2429 2430 /** 2431 * Convert lone less than signs. 2432 * 2433 * KSES already converts lone greater than signs. 2434 * 2435 * @uses wp_pre_kses_less_than_callback in the callback function. 2436 * @since 2.3.0 2437 * 2438 * @param string $text Text to be converted. 2439 * @return string Converted text. 2440 */ 2441 function wp_pre_kses_less_than( $text ) { 2442 return preg_replace_callback('%<[^>]*?((?=<)|>|$)%', 'wp_pre_kses_less_than_callback', $text); 2443 } 2444 2445 /** 2446 * Callback function used by preg_replace. 2447 * 2448 * @uses esc_html to format the $matches text. 2449 * @since 2.3.0 2450 * 2451 * @param array $matches Populated by matches to preg_replace. 2452 * @return string The text returned after esc_html if needed. 2453 */ 2454 function wp_pre_kses_less_than_callback( $matches ) { 2455 if ( false === strpos($matches[0], '>') ) 2456 return esc_html($matches[0]); 2457 return $matches[0]; 2458 } 2459 2460 /** 2461 * WordPress implementation of PHP sprintf() with filters. 2462 * 2463 * @since 2.5.0 2464 * @link http://www.php.net/sprintf 2465 * 2466 * @param string $pattern The string which formatted args are inserted. 2467 * @param mixed $args,... Arguments to be formatted into the $pattern string. 2468 * @return string The formatted string. 2469 */ 2470 function wp_sprintf( $pattern ) { 2471 $args = func_get_args( ); 2472 $len = strlen($pattern); 2473 $start = 0; 2474 $result = ''; 2475 $arg_index = 0; 2476 while ( $len > $start ) { 2477 // Last character: append and break 2478 if ( strlen($pattern) - 1 == $start ) { 2479 $result .= substr($pattern, -1); 2480 break; 2481 } 2482 2483 // Literal %: append and continue 2484 if ( substr($pattern, $start, 2) == '%%' ) { 2485 $start += 2; 2486 $result .= '%'; 2487 continue; 2488 } 2489 2490 // Get fragment before next % 2491 $end = strpos($pattern, '%', $start + 1); 2492 if ( false === $end ) 2493 $end = $len; 2494 $fragment = substr($pattern, $start, $end - $start); 2495 2496 // Fragment has a specifier 2497 if ( $pattern{$start} == '%' ) { 2498 // Find numbered arguments or take the next one in order 2499 if ( preg_match('/^%(\d+)\$/', $fragment, $matches) ) { 2500 $arg = isset($args[$matches[1]]) ? $args[$matches[1]] : ''; 2501 $fragment = str_replace("%{$matches[1]}$", '%', $fragment); 2502 } else { 2503 ++$arg_index; 2504 $arg = isset($args[$arg_index]) ? $args[$arg_index] : ''; 2505 } 2506 2507 // Apply filters OR sprintf 2508 $_fragment = apply_filters( 'wp_sprintf', $fragment, $arg ); 2509 if ( $_fragment != $fragment ) 2510 $fragment = $_fragment; 2511 else 2512 $fragment = sprintf($fragment, strval($arg) ); 2513 } 2514 2515 // Append to result and move to next fragment 2516 $result .= $fragment; 2517 $start = $end; 2518 } 2519 return $result; 2520 } 2521 2522 /** 2523 * Localize list items before the rest of the content. 2524 * 2525 * The '%l' must be at the first characters can then contain the rest of the 2526 * content. The list items will have ', ', ', and', and ' and ' added depending 2527 * on the amount of list items in the $args parameter. 2528 * 2529 * @since 2.5.0 2530 * 2531 * @param string $pattern Content containing '%l' at the beginning. 2532 * @param array $args List items to prepend to the content and replace '%l'. 2533 * @return string Localized list items and rest of the content. 2534 */ 2535 function wp_sprintf_l($pattern, $args) { 2536 // Not a match 2537 if ( substr($pattern, 0, 2) != '%l' ) 2538 return $pattern; 2539 2540 // Nothing to work with 2541 if ( empty($args) ) 2542 return ''; 2543 2544 // Translate and filter the delimiter set (avoid ampersands and entities here) 2545 $l = apply_filters('wp_sprintf_l', array( 2546 /* translators: used between list items, there is a space after the coma */ 2547 'between' => __(', '), 2548 /* translators: used between list items, there is a space after the and */ 2549 'between_last_two' => __(', and '), 2550 /* translators: used between only two list items, there is a space after the and */ 2551 'between_only_two' => __(' and '), 2552 )); 2553 2554 $args = (array) $args; 2555 $result = array_shift($args); 2556 if ( count($args) == 1 ) 2557 $result .= $l['between_only_two'] . array_shift($args); 2558 // Loop when more than two args 2559 $i = count($args); 2560 while ( $i ) { 2561 $arg = array_shift($args); 2562 $i--; 2563 if ( 0 == $i ) 2564 $result .= $l['between_last_two'] . $arg; 2565 else 2566 $result .= $l['between'] . $arg; 2567 } 2568 return $result . substr($pattern, 2); 2569 } 2570 2571 /** 2572 * Safely extracts not more than the first $count characters from html string. 2573 * 2574 * UTF-8, tags and entities safe prefix extraction. Entities inside will *NOT* 2575 * be counted as one character. For example & will be counted as 4, < as 2576 * 3, etc. 2577 * 2578 * @since 2.5.0 2579 * 2580 * @param integer $str String to get the excerpt from. 2581 * @param integer $count Maximum number of characters to take. 2582 * @return string The excerpt. 2583 */ 2584 function wp_html_excerpt( $str, $count ) { 2585 $str = strip_tags( $str ); 2586 $str = mb_substr( $str, 0, $count ); 2587 // remove part of an entity at the end 2588 $str = preg_replace( '/&[^;\s]{0,6}$/', '', $str ); 2589 return $str; 2590 } 2591 2592 /** 2593 * Add a Base url to relative links in passed content. 2594 * 2595 * By default it supports the 'src' and 'href' attributes. However this can be 2596 * changed via the 3rd param. 2597 * 2598 * @since 2.7.0 2599 * 2600 * @param string $content String to search for links in. 2601 * @param string $base The base URL to prefix to links. 2602 * @param array $attrs The attributes which should be processed. 2603 * @return string The processed content. 2604 */ 2605 function links_add_base_url( $content, $base, $attrs = array('src', 'href') ) { 2606 $attrs = implode('|', (array)$attrs); 2607 return preg_replace_callback("!($attrs)=(['\"])(.+?)\\2!i", 2608 create_function('$m', 'return _links_add_base($m, "' . $base . '");'), 2609 $content); 2610 } 2611 2612 /** 2613 * Callback to add a base url to relative links in passed content. 2614 * 2615 * @since 2.7.0 2616 * @access private 2617 * 2618 * @param string $m The matched link. 2619 * @param string $base The base URL to prefix to links. 2620 * @return string The processed link. 2621 */ 2622 function _links_add_base($m, $base) { 2623 //1 = attribute name 2 = quotation mark 3 = URL 2624 return $m[1] . '=' . $m[2] . 2625 (strpos($m[3], 'http://') === false ? 2626 path_join($base, $m[3]) : 2627 $m[3]) 2628 . $m[2]; 2629 } 2630 2631 /** 2632 * Adds a Target attribute to all links in passed content. 2633 * 2634 * This function by default only applies to <a> tags, however this can be 2635 * modified by the 3rd param. 2636 * 2637 * <b>NOTE:</b> Any current target attributed will be striped and replaced. 2638 * 2639 * @since 2.7.0 2640 * 2641 * @param string $content String to search for links in. 2642 * @param string $target The Target to add to the links. 2643 * @param array $tags An array of tags to apply to. 2644 * @return string The processed content. 2645 */ 2646 function links_add_target( $content, $target = '_blank', $tags = array('a') ) { 2647 $tags = implode('|', (array)$tags); 2648 return preg_replace_callback("!<($tags)(.+?)>!i", 2649 create_function('$m', 'return _links_add_target($m, "' . $target . '");'), 2650 $content); 2651 } 2652 /** 2653 * Callback to add a target attribute to all links in passed content. 2654 * 2655 * @since 2.7.0 2656 * @access private 2657 * 2658 * @param string $m The matched link. 2659 * @param string $target The Target to add to the links. 2660 * @return string The processed link. 2661 */ 2662 function _links_add_target( $m, $target ) { 2663 $tag = $m[1]; 2664 $link = preg_replace('|(target=[\'"](.*?)[\'"])|i', '', $m[2]); 2665 return '<' . $tag . $link . ' target="' . $target . '">'; 2666 } 2667 2668 // normalize EOL characters and strip duplicate whitespace 2669 function normalize_whitespace( $str ) { 2670 $str = trim($str); 2671 $str = str_replace("\r", "\n", $str); 2672 $str = preg_replace( array( '/\n+/', '/[ \t]+/' ), array( "\n", ' ' ), $str ); 2673 return $str; 2674 } 2675 2676 ?>
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