PHP access to client and server-side IP encapsulation class _php tips

The examples in this article describe the encapsulation classes of PHP acquiring client and server-side IP. Share to everyone for your reference, specific as follows:

Client IP-related variables:

1. $_server[' REMOTE_ADDR ']; Client IP, there may be the user's IP, but also may be the agent's IP.

2. $_server[' Http_client_ip ']; Agent-side IP, may exist, can be forged.

3. $_server[' http_x_forwarded_for ']; The user is in which IP to use the agent that may exist and can be forged.

Server-side IP-related variables:

1. $_server["SERVER_NAME"], you need to use the function gethostbyname () to obtain. This variable is displayed correctly on both the server side and the client.

2. $_server["SERVER_ADDR"], testing on the server side: 127.0.0.1 (this is related to the set value of Bindaddress in httpd.conf). The test results are correct on the client.

The classes are as follows:

Class getip{
 function ClientIP () {
 $cIP = getenv (' remote_addr ');
 $cIP 1 = getenv (' http_x_forwarded_for ');
 $cIP 2 = getenv (' http_client_ip ');
 $cIP 1? $cIP = $cIP 1:null;
 $cIP 2? $cIP = $cIP 2:null;
 return $cIP;
 }
 function ServerIP () {return
 gethostbyname ($_server["SERVER_NAME"]);
 }
$getIP = new GetIP ();
$clientIp = Getip::clientip ();
$serverIp = Getip::serverip ();
Echo ' Client IP is ', $clientIp, ' <br/> ';
Echo ' Server IP is ', $serverIp, ' <br/> ';

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