ผมจะไปใช้ php 7 แต่ฟังค์ชั่นนี้ ใช้ไม่ได้แล้ว ผมจะใช้อะไรแทนครับ

function slug($string)
    {
        return strtolower(trim(preg_replace('~[^0-9a-z]+~i', '-', html_entity_decode(preg_replace('~&([a-z]{1,2})(?:acute|cedil|circ|grave|lig|orn|ring|slash|th|tilde|uml);~i', '$1', htmlentities($string, ENT_QUOTES, 'UTF-8')), ENT_QUOTES, 'UTF-8')), '-'));
    }
    function get_random($matches)
    {
        $rand = array_rand($split = explode("|", $matches[1]));
        return $split[$rand];
    }
    function show_randomized($str)
    {
        $new_str = preg_replace_callback('/\{([^{}]*)\}/im', "get_random", $str);
        if ($new_str !== $str)
            $str = show_randomized($new_str);
        return $str;
    }