#encoder-decoder une chaine - compatible URL pour GET #https://www.php.net/base64_encode function base64url_encode($data) { return rtrim(strtr(base64_encode($data), '+/', '-_'), '='); } function base64url_decode($data) { return base64_decode(str_pad(strtr($data, '-_', '+/'), strlen($data) % 4, '=', STR_PAD_RIGHT)); }