Sluggify a string with php

Sluggify a string with php

/*
 * Modifies a string to remove all non ASCII characters and spaces.
 * Try slugify("é&asd_æô") for example
 */
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;
}