Create a unique slug from title

Laravel-unique-slug.php

/**
 * Create a unique slug from title.
 * 
 * @link https://stackoverflow.com/questions/38800581/laravel-str-slug-not-working-for-unicode-bangla/38800717
 * @link https://laracasts.com/discuss/channels/general-discussion/l5-routing-1
 * @param  string $title
 * @return string
 */
public function makeSlugFromTitle($title)
{
    $slug = preg_replace('/\s+/u', '-', trim($title));

    $count = Category::whereRaw("slug RLIKE '^{$slug}(-[0-9]+)?$'")->count();

    return $count ? "{$slug}-{$count}" : $slug;
}