1 function getIP() {
 2     if (@$_SERVER["HTTP_X_FORWARDED_FOR"]) {
 3         $ip = $_SERVER["HTTP_X_FORWARDED_FOR"];
 4     } else if (@$_SERVER["HTTP_CLIENT_IP"]) {
 5         $ip = $_SERVER["HTTP_CLIENT_IP"];
 6     } else if (@$_SERVER["REMOTE_ADDR"]) {
 7         $ip = $_SERVER["REMOTE_ADDR"];
 8     } else if (@getenv("HTTP_X_FORWARDED_FOR")) {
 9         $ip = getenv("HTTP_X_FORWARDED_FOR");
10     } else if (@getenv("HTTP_CLIENT_IP")) {
11         $ip = getenv("HTTP_CLIENT_IP");
12     } else if (@getenv("REMOTE_ADDR")) {
13         $ip = getenv("REMOTE_ADDR");
14     } else {
15         $ip = "Unknown";
16     }
17 
18     return $ip;
19 }

 1 $__DEV__ = false;
 2 
 3 if( strpos($IP,‘192.168‘) !== false  || strpos($IP,‘127.0.0.1‘) !== false) { //comment
 4     $__DEV__ = true;
 5     
 6     sleep(1);
 7 }
 8 
 9 if (!$__DEV__) { //comment
10 
11     “线上！”
12 
13 } else {
14 
15     “线下！”
16 
17 }