str2url

str2url.php

function str2url($string, $slug = '-', $extra = null)
{
  return strtolower(trim(preg_replace('~[^0-9a-z' . preg_quote($extra, '~') . ']+~i', $slug, unaccent($string)), $slug));
}

function unaccent($string) // normalizes (romanization) accented chars
{
    if (strpos($string = htmlentities($string, ENT_QUOTES, 'UTF-8'), '&') !== false) {
        $string = html_entity_decode(preg_replace('~&([a-z]{1,2})(?:acute|cedil|circ|grave|lig|orn|ring|slash|tilde|uml);~i', '$1', $string), ENT_QUOTES, 'UTF-8');
    }

    return $string;
}