Function creates url properly slug from $text

slugify.php

<?php
/**
 * Function creates url properly slug from $text
 * 
 * @param string $text
 */
public function slugify($text)
{
    // replace non letter or digits by -
    $text = preg_replace('#[^\\pL\d]+#u', '-', $text);

    // trim
    $text = trim($text, '-');

    // transliterate
    if (function_exists('iconv'))
    {
        $text = iconv('utf-8', 'us-ascii//TRANSLIT', $text);
    }

    // lowercase
    $text = strtolower($text);

    // remove unwanted characters
    $text = preg_replace('#[^-\w]+#', '', $text);

    if (empty($text))
    {
        return 'n-a';
    }

    return $text;
}

?>