Spell Check Engine...

I have a content management system written in PHP, and the user wants a Spell Checker built into the HTML forms.  i.e., when she enters text into a text area just like this question I'm entering, she wants to perform a spell check to ensure that the info is spelled correctly.  Does anybody know of an open source spell check API I could plug in for her with relative ease?

Thanks,
Scott.
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kbachAsked:
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spearman123Commented:
<?php

class SpellChecker {
    var $command;
    var $text;
    var $errors = array();
    function SpellChecker($command = 'ispell') {
        $this->command = $command;
    }
    function check($text) {
        // Spell checks text, returns int number of errors found
        $this->text = $text;
        // Create temporary file, write text to that file
        // Important: First, ensure every line starts with ^ to avoid special ispell commands
        // see http://savannah.gnu.org/download/aspell/manual/user/6_Writing.html
        $text = '^'.implode("\n^", explode("\n", $text));
        $tmp = tempnam('/tmp', 'spl');
        $fp = fopen($tmp, 'w');
        fwrite($fp, $text);
        fclose($fp);
        // Run the spell checking command, capture output
        $output = `{$this->command} -a < $tmp`;
        # print '<pre>'; print($output); print '</pre>';
        // Delete the temporary file
        unlink($tmp);
        // Parse output and populate errors array
        $num_errors = preg_match_all('|^& (\w+) \d+ \d+: (.*?)$|m', $output, $matches);
        // This regexp picks up words for which ispell made no suggestions (different pattern)
        $extra_errors = preg_match_all('|^# (\w+)( ).*$|m', $output, $matches2);
        // Merge the arrays
        for ($i = 0; $i < $extra_errors; $i++) {
            $matches[0][] = $matches2[0][$i];
            $matches[1][] = $matches2[1][$i];
            $matches[2][] = $matches2[2][$i];
        }
        $num_errors += $extra_errors;
        for ($i = 0; $i < $num_errors; $i++) {
            $word = $matches[1][$i];
            // Check that word has not already been found as an error
            if (in_array($word, array_keys($this->errors))) {
                continue;
            }
            $suggestions = explode(', ', $matches[2][$i]);
            $this->errors[$word] = $suggestions;
        }
        return $num_errors;
    }
    function getErrors() {
        return $this->errors;
        /* errors is an array with the following structure:
        Array
        (
            [speling] => Array
                (
                    [0] => spelling
                    [1] => spewing
                    [2] => spiling
                )
       
            [twwo] => Array
                (
                    [0] => two
                )
        )
        */
    }
}

?>

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