Persian slug trait for PHP

Sluggable.php

<?php

namespace App\Traits;

use Illuminate\Support\Str;

/**
 * Trait Sluggable
 * @package App\Traits
 */
trait Sluggable
{
    /**
     * @return string
     */
    public function getSlugAttribute()
    {
        return $this->slug($this->{$this->sluggable});
    }

    /**
     * @param $value
     *
     * @return string
     */
    public function slug($value)
    {
        $separator = $this->separator ?? '-';

        $limit = $this->slugLimitWord ?? 100;
        $string = strtolower($value);
        $string = str_replace('‌', ' ', $string);
        $string = Str::words($string, $limit);
        $string = mb_ereg_replace('([^آ-ی۰-۹a-z0-9]|-)+', $separator, $string);
        $string = strtolower($string);
        
        return trim($string, $separator);
    }
}