Replace accented characters

    public function normaliza ($string){
        $a = 'ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõöøùúûýýþÿŔŕ';   
        $b = 'aaaaaaaceeeeiiiidnoooooouuuuybsaaaaaaaceeeeiiiidnoooooouuuyybyRr';
        $string = utf8_decode($string);   
        $string = strtr($string, utf8_decode($a), $b);
        $string = strtolower($string);
        return  utf8_encode($string) ;
    }