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   1  <?php
   2  
   3  class SpellChecker {
   4      var $command;
   5      var $text;
   6      var $errors = array();
   7      function SpellChecker($command = 'ispell') {
   8          $cwd = getcwd();
   9          $this->command = $command." --home-dir=$cwd";
  10      }
  11      function check($text) {
  12          // Spell checks text, returns int number of errors found
  13          $this->text = $text;
  14          // Create temporary file, write text to that file
  15          // Important: First, ensure every line starts with ^ to avoid special ispell commands
  16          // see http://savannah.gnu.org/download/aspell/manual/user/6_Writing.html
  17          $text = '^'.implode("\n^", explode("\n", $text));
  18          $tmp = tempnam('/tmp', 'spl');
  19          $fp = fopen($tmp, 'w');
  20          fwrite($fp, $text);
  21          fclose($fp);
  22          // Run the spell checking command, capture output
  23          $output = `{$this->command} -a < $tmp`;
  24          # print '<pre>'; print($output); print '</pre>';
  25          // Delete the temporary file
  26          unlink($tmp);
  27          // Parse output and populate errors array
  28          $num_errors = preg_match_all('|^& (\w+) \d+ \d+: (.*?)$|m', $output, $matches);
  29          // This regexp picks up words for which ispell made no suggestions (different pattern)
  30          $extra_errors = preg_match_all('|^# (\w+)( ).*$|m', $output, $matches2);
  31          // Merge the arrays
  32          for ($i = 0; $i < $extra_errors; $i++) {
  33              $matches[0][] = $matches2[0][$i];
  34              $matches[1][] = $matches2[1][$i];
  35              $matches[2][] = $matches2[2][$i];
  36          }
  37          $num_errors += $extra_errors;
  38          for ($i = 0; $i < $num_errors; $i++) {
  39              $word = $matches[1][$i];
  40              // Check that word has not already been found as an error
  41              if (in_array($word, array_keys($this->errors))) {
  42                  continue;
  43              }
  44              $suggestions = explode(', ', $matches[2][$i]);
  45              $this->errors[$word] = $suggestions;
  46          }
  47          return $num_errors;
  48      }
  49      function getErrors() {
  50          return $this->errors;
  51          /* errors is an array with the following structure:
  52          Array
  53          (
  54              [speling] => Array
  55                  (
  56                      [0] => spelling
  57                      [1] => spewing
  58                      [2] => spiling
  59                  )
  60          
  61              [twwo] => Array
  62                  (
  63                      [0] => two
  64                  )
  65          )
  66          */
  67      }
  68  }
  69  
  70  ?>