sanitize.php

sanitize.php

<?php
function sanitize($string) {
    return strtolower(
        trim(
            preg_replace('~[^0-9a-z]+~i', '-', html_entity_decode(preg_replace('~&([a-z]{1,2})(?:acute|cedil|circ|grave|lig|orn|ring|slash|th|tilde|uml);~i', '$1', htmlentities($string, ENT_QUOTES, 'UTF-8')), ENT_QUOTES, 'UTF-8')),
        '-')
    );
}

var_dump(sanitize(" Hey oH, c'est l'été ! ")); // "hey-oh-c-est-l-ete"