Php obtains the real IP address of the remote client.

Welcome to the Linux community forum and interact with 2 million technical staff. This article describes how to obtain the real IP address of a remote client in php and how to obtain the IP address of a remote client in php programming, A friend in need can make a reference. Use $ _ SERVER [REMOTE_ADDR] in PHP to obtain the IP address of the client.

Welcome to the Linux community forum and interact with 2 million technical staff> This article describes how to obtain the real IP address of a remote client in php and how to obtain the IP address of a remote client in php programming, A friend in need can make a reference. Use $ _ SERVER ["REMOTE_ADDR"] in PHP to obtain the IP address of the client, but if the client is

Welcome to the Linux community forum and interact with 2 million technicians>

This article describes how to obtain the real IP address of a remote client in php. Learn how to obtain the IP address of a remote client in php programming.

Use $ _ SERVER ["REMOTE_ADDR"] in PHP to obtain the IP address of the client. However, if the client is accessed by a proxy SERVER, the IP address of the proxy SERVER is obtained, instead of the real client IP address.

Common methods for obtaining client IP addresses:

1. REMOTE_ADDR: IP address of the user's computer browsing the current page

2, HTTP_X_FORWARDED_FOR: view the gateway of the user's computer on the current page

3. HTTP_CLIENT_IP: Client ip Address

Use $ _ SERVER ["REMOTE_ADDR"] in PHP to obtain the IP address of the client. However, if the client is accessed by a proxy SERVER, the IP address of the proxy SERVER is obtained, instead of the real client IP address.

To obtain the real IP address of the client through the proxy SERVER, use $ _ SERVER ["HTTP_X_FORWARDED_FOR"] to read it.

Note that not every proxy SERVER can use $ _ SERVER ["HTTP_X_FORWARDED_FOR"] to read the real IP address of the client. Some of the IP addresses read by this method are still the IP address of the proxy SERVER.

Note that if the client is not accessed through the proxy SERVER, the value obtained using $ _ SERVER ["HTTP_X_FORWARDED_FOR"] will be null.