问题 i made this simple code to prevent hotlinking my files from my php download file : if ((strpos($_SERVER['HTTP_REFERER'],'www.domain.com')!==0)) { $redirect='index.php'; header("Location: $redirect"); exit; } it's not working , it always redirect me to index.php even if i clicked the link inside my wbesite. i tried to change the domain to many types like : http://www.domain.com www.domain.com domain.com domain but still the same problem 回答1: i found the solution, i just made a compare between