1 function error_to_back_home(){
2     /*@是抑制显示错误信息，有错也不显示*/
3     @header("http/1.1 404 not found"); 
4     @header("status: 404 not found"); 
5     @header("location: /404.html"); //跳转到404页面
6     exit();
7 }

1 @header($_SERVER["SERVER_PROTOCOL"]." 404 Not Found");//不区分协议1.1 /1.0
2 @header("Status: 404 Not Found");
3 
4 $_SERVER['REDIRECT_STATUS'] = 404;
5 //If you don't know which web page is in use, use any page that doesn't exists
6 $handle = curl_init('http://'. $_SERVER["HTTP_HOST"] .'/404missing.html');
7 curl_exec($handle);
8 exit();