function urlsafe_base64encode($string) { $data = base64_encode($string); $data = str_replace(array('+','/','='),array('-','_',''),$data); return $data; }
function urlsafe_base64decode($string) { $data = str_replace(array('-','_'),array('+','/'),$string); $mod4 = strlen($data) % 4; if ($mod4) { $data .= substr('====', $mod4); } return base64_decode($data); }