Convert title to seo friendly url

SanitizeUrl.php

<?php
class SanitizeUrl {

    public static function slug($string, $space="-") {
        $string = utf8_encode($string);
        if (function_exists('iconv')) {
            $string = iconv('UTF-8', 'ASCII//TRANSLIT', $string);
        }
        
        $string = preg_replace("/[^a-zA-Z0-9 \-]/", "", $string);
        $string = trim(preg_replace("/\\s+/", " ", $string));
        $string = strtolower($string);
        $string = str_replace(" ", $space, $string);
         
        return $string;
    }
}

$title = 'Thi is a test string with some "strange" chars ò à ù...';
echo SanitizeUrl::slug($title);
//this will output:
//thi-is-a-test-string-with-some-strange-chars-o-a-u