Remove HTML Tags From Comment

function strip_tags_attributes($string,$allowtags=NULL,$allowattributes=NULL)
{
if($allowattributes){
if(!is_array($allowattributes))
$allowattributes = explode(",",$allowattributes);
if(is_array($allowattributes))
$allowattributes = implode("|",$allowattributes);
$rep = '/([^>]*) ('.$allowattributes.')(=)(\'.*\'|".*")/i';
$string = preg_replace($rep, '$1 $2_-_-$4', $string);
}
if(preg_match('/([^>]*) (.*)(=\'.*\'|=".*")(.*)/i',$string) > 0){
$string = preg_replace('/([^>]*) (.*)(=\'.*\'|=".*")(.*)/i', '$1$4', $string);
}
$rep = '/([^>]*) ('.$allowattributes.')(_-_-)(\'.*\'|".*")/i';
if($allowattributes)
$string = preg_replace($rep, '$1 $2=$4', $string);
return strip_tags($string,$allowtags);
}