删除仅包含特殊字符的数组

How can I remove all elements from an array that contain only special characters (such as ., * etc...).

function only_specialchars($string) {
    if (preg_match("/[a-z0-9]/i", $string)) {
        return false;
    } else {
        return true;
    }
}

$filtered = array_filter($array, "only_specialchars"));

Something like this? This will filter all words that do not contain characters or numbers.