Netcom client downloads ip PHP to obtain the encapsulation class of client and server IP

The example in this article describes the encapsulation class for PHP to obtain client and server IP. Share it with everyone for your reference, the details are as follows:

Client IP related variables:

1. $_SERVER['REMOTE_ADDR']; The client IP may be the user's IP or the proxy's IP.

2. $_SERVER['HTTP_CLIENT_IP']; The proxy IP may exist and can be forged.

3. $_SERVER['HTTP_X_FORWARDED_FOR']; Which IP the user uses as a proxy may exist and can be forged.

Server-side IP related variables:

1. $_SERVER["SERVER_NAME"], which needs to be obtained using the function gethostbyname(). This variable displays correctly on both the server and client sides.

2. $_SERVER["SERVER_ADDR"], tested on the server side: 127.0.0.1 (this is related to the setting value of BindAddress in httpd.conf). The test results on the client are correct.

The categories are as follows:

class getIP{
 function clientIP(){
 $cIP = getenv('REMOTE_ADDR');
 $cIP1 = getenv('HTTP_X_FORWARDED_FOR');
 $cIP2 = getenv('HTTP_CLIENT_IP');
 $cIP1 ? $cIP = $cIP1 : null;
 $cIP2 ? $cIP = $cIP2 : 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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