Supprimer les balises HTML d'un texte

/**
 * Extract plain Text from HTML
 * @param string $_html HTML code
 * @param int $_len plain text length
 * @return string plain Text
 */
    public static function stripTags($_html, $_len) {
        //extract plain text
        $text= strip_tags($_html);

        if (strlen($text) > $_len)
        {
            $str = substr($text, 0, $_len);
            $pos = strrpos($str, " ");
            return substr($str, 0, $pos)."...";
        } else {
            return $text;
        }
    }