str_slug() (Str::slug) for arabic & Persian (farsi) Languages in laravel

Utils.php

<?php
/**
 * Created by PhpStorm.
 * User: Hossin Asaadi
 * Date: 9/2/2019
 * Time: 7:43 PM
 */

namespace App\Traits;


trait Utils
{
    function make_slug($string, $separator = '-')
    {
        $string = trim($string);
        $string = mb_strtolower($string, 'UTF-8');

        // Make alphanumeric (removes all other characters)
        // this makes the string safe especially when used as a part of a URL
        // this keeps latin characters and Persian characters as well
        $string = preg_replace("/[^a-z0-9_\s-ءاآؤئبپتثجچحخدذرزژسشصضطظعغفقكکگلمنوهی]/u", '', $string);

        // Remove multiple dashes or whitespaces or underscores
        $string = preg_replace("/[\s-_]+/", ' ', $string);

        // Convert whitespaces and underscore to the given separator
        $string = preg_replace("/[\s_]/", $separator, $string);

        return $string;
    }

}