htmlentities: é
htmlentities + utf8_decode: 
rawurlencode: allo%20toi
urlencode: allo+toi
rawurlencode (utf8): succ%C3%A8s%20%C3%A9%20%C3%A0
rawurlencode (iso): succ%E8s%20%E9%20%E0
urlencode (utf8): succ%C3%A8s+%C3%A9+%C3%A0
urlencode (iso): succ%E8s+%E9+%E0