Script Filter Parameter

function filter_param($text,$html=true){
        $e_s=array('\\','\'','"');
        $d_s=array('','','');
        $text = preg_replace( "'<script[^>]*>.*?</script>'si", '', $text );
        $text = preg_replace( '/<a\s+.*?href="([^"]+)"[^>]*>([^<]+)<\/a>/is', '\2 (\1)', $text );
        $text = preg_replace( '/<!--.+?-->/', '', $text );
        $text = preg_replace( '/{.+?}/', '', $text );
        $text = preg_replace( '/&nbsp;/', ' ', $text );
        $text = preg_replace( '/&amp;/', '', $text );
        $text = str_replace( $e_s, $d_s, $text );
        $text = strip_tags( $text );
        $text = preg_replace("/\r\n\r\n\r\n+/", " ", $text);
        $text = $html ? htmlspecialchars( $text ) : $text;
        return $text;
}