I am creating a function for sanitising user inputs and user inputted data outputs.Please offer advise on any improvements which could be made:function cleanse($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 $output;}function sanitise($input) {    if (is_array($input)) {        foreach($input as $var=>$val) {            $output[$var] = sanitize($val);        }    } else {        $input  = cleanse($input);        $output = htmlspecialchars($input, ENT_QUOTES,'UTF-8',false);    }    return $output;}
Sanitising user inputs and user inputted data outputs
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