PHP function to strip all html tags and comments from a string

strip_html.php

function html2txt($document){
    $search = array('@<script[^>]*?>.*?</script>@si',  // Strip out javascript
        '@<[\/\!]*?[^<>]*?>@si',            // Strip out HTML tags
        '@<style[^>]*?>.*?</style>@siU',    // Strip style tags properly
        '@<![\s\S]*?--[ \t\n\r]*>@'         // Strip multi-line comments including CDATA
    );
    $text = preg_replace($search, '', $document);
    return $text;
}