1 function ip() {
 2     if(getenv('HTTP_CLIENT_IP') && strcasecmp(getenv('HTTP_CLIENT_IP'), 'unknown')) {
 3         $ip = getenv('HTTP_CLIENT_IP');
 4     } elseif(getenv('HTTP_X_FORWARDED_FOR') && strcasecmp(getenv('HTTP_X_FORWARDED_FOR'), 'unknown')) {
 5         $ip = getenv('HTTP_X_FORWARDED_FOR');
 6     } elseif(getenv('REMOTE_ADDR') && strcasecmp(getenv('REMOTE_ADDR'), 'unknown')) {
 7         $ip = getenv('REMOTE_ADDR');
 8     } elseif(isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], 'unknown')) {
 9         $ip = $_SERVER['REMOTE_ADDR'];
10     }
11     return preg_match ( '/[\d\.]{7,15}/', $ip, $matches ) ? $matches [0] : '';
12 }

 1 <?php
 2 $headers['CLIENT-IP'] = '2.2.2.2'; 
 3 $headers['X-FORWARDED-FOR'] = '3.3.3.3,8.8.8.8';
 4 $headerArr = array(); 
 5 foreach( $headers as $n => $v ) { 
 6 $headerArr[] = $n .':' . $v; 
 7 }
 8 ob_start();
 9 $ch = curl_init();
10 curl_setopt ($ch, CURLOPT_URL, "http://www.my.com/ip_response.php");
11 curl_setopt ($ch, CURLOPT_HTTPHEADER , $headerArr ); //构造IP
12 curl_setopt ($ch, CURLOPT_REFERER, "http://www.163.com/ "); //构造来路
13 curl_setopt( $ch, CURLOPT_HEADER, 1);
14 curl_setopt($ch, CURLOPT_POST, 1);//post方式发送数据
15 curl_exec($ch);
16 curl_close ($ch);
17 $out = ob_get_contents();
18 ob_clean();
19 echo $out;
20 ?>

1 <?php
2 print_r($_SERVER);
3 ?>

 1 HTTP/1.1 200 OK
 2 Date: Wed, 08 Mar 2017 02:57:08 GMT
 3 Server: Apache/2.4.9 (Win32) PHP/5.5.12
 4 X-Powered-By: PHP/5.5.12
 5 Content-Length: 2028
 6 Connection: close
 7 Content-Type: text/html
 8 
 9 Array
10 (
11 [HTTP_HOST] => www.my.com
12 [HTTP_ACCEPT] => */*
13 [HTTP_REFERER] => http://www.163.com/
14 [HTTP_CLIENT_IP] => 2.2.2.2
15 [HTTP_X_FORWARDED_FOR] => 3.3.3.3,8.8.8.8
16 [CONTENT_TYPE] => application/x-www-form-urlencoded
17 [HTTP_EXPECT] => 100-continue
18 [PATH] => C:\Program Files\Java\jdk1.8.0_31\bin;C:\Program Files\Java\jdk1.8.0_31\jre\bin;C:\Program Files\Java\jdk1.8.0_31\bin;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\Program Files\Java\bin;C:\Program Files (x86)\MacType;F:\Program Files\TortoiseSVN\bin;C:\Python27\;C:\Program Files\nodejs\;C:\WINDOWS\system32\config\systemprofile\.dnx\bin;C:\Program Files\Microsoft DNX\Dnvm\;C:\Program Files (x86)\Windows Kits\8.1\Windows Performance Toolkit\;C:\Program Files\Microsoft SQL Server\130\Tools\Binn\;E:\WAMP\bin\php\php5.5.12;C:\WINDOWS\system32\config\systemprofile\AppData\Local\Microsoft\WindowsApps
19 [SystemRoot] => C:\WINDOWS
20 [COMSPEC] => C:\WINDOWS\system32\cmd.exe
21 [PATHEXT] => .COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC
22 [WINDIR] => C:\WINDOWS
23 [SERVER_SIGNATURE] => <address>Apache/2.4.9 (Win32) PHP/5.5.12 Server at www.my.com Port 80</address>
24 
25 [SERVER_SOFTWARE] => Apache/2.4.9 (Win32) PHP/5.5.12
26 [SERVER_NAME] => www.my.com
27 [SERVER_ADDR] => 127.0.0.1
28 [SERVER_PORT] => 80
29 [REMOTE_ADDR] => 127.0.0.1
30 [DOCUMENT_ROOT] => E:/WAMP/www/my
31 [REQUEST_SCHEME] => http
32 [CONTEXT_PREFIX] => 
33 [CONTEXT_DOCUMENT_ROOT] => E:/WAMP/www/my
34 [SERVER_ADMIN] => [email protected]
35 [SCRIPT_FILENAME] => E:/WAMP/www/my/ip_response.php
36 [REMOTE_PORT] => 59461
37 [GATEWAY_INTERFACE] => CGI/1.1
38 [SERVER_PROTOCOL] => HTTP/1.1
39 [REQUEST_METHOD] => POST
40 [QUERY_STRING] => 
41 [REQUEST_URI] => /ip_response.php
42 [SCRIPT_NAME] => /ip_response.php
43 [PHP_SELF] => /ip_response.php
44 [REQUEST_TIME_FLOAT] => 1488941828.317
45 [REQUEST_TIME] => 1488941828
46 )