Sanatize inputs PHP

<?
function cleanInput($input) {
 
$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
);
 
    $output = preg_replace($search, '', $input);
    return $output;
}
?>