Laravel unique slug generator

Slug.php

<?php namespace App\Libraries;

use DB;

class Slug {
	
	// Create a unique slug
	static function make($name, $table = null, $column = null)
	{
		$valid = false;
		$i = 0;
		while(!$valid) {
			if($i) {
				$slug = Self::make_slug($name . '-' . $i);
			} else {
				$slug = Self::make_slug($name);
			}
			
			// Check in the database
			if(!is_null($table) && !is_null($column)) {
				$dbslug = DB::table($table)->where($column, '=', $slug)->get();
				if(!$dbslug) {
					return $slug;
				} else {
					$i++;
				}
			} else {
				return $slug;
			}
		}
		
	}

	static function make_slug($text)
	{
		$text = preg_replace('~[^\\pL\d]+~u', '-', $text); // replace non letter or digits by -
		$text = trim($text, '-'); // trim
		$text = iconv('utf-8', 'us-ascii//TRANSLIT', $text); // transliterate
		$text = strtolower($text); // lowercase
		$text = preg_replace('~[^-\w]+~', '', $text);  // remove unwanted characters
		$text = preg_replace('/-+/', '-', $text); // Remove duplicates
		if (empty($text)) return 'n-a';
		return $text;
	}

}