Php Method for judging access IP addresses

This article mainly introduces php's method of determining the IP address to be accessed. It involves php's judgment and usage skills on the SERVER's predefined variable $ _ SERVER. For more information, see

This article mainly introduces php's method of determining the IP address to be accessed. It involves php's judgment and usage skills on the SERVER's predefined variable $ _ SERVER. For more information, see

This example describes how to use php to determine the IP address to access. Share it with you for your reference. The details are as follows:

<? Php function getIP () {if (! Empty ($ _ SERVER ["HTTP_CLIENT_IP"]) {$ cip = $ _ SERVER ["HTTP_CLIENT_IP"];} else if (! Empty ($ _ SERVER ["HTTP_X_FORWARDED_FOR"]) {$ cip = $ _ SERVER ["HTTP_X_FORWARDED_FOR"];} else if (! Empty ($ _ SERVER ["REMOTE_ADDR"]) {$ cip = $ _ SERVER ["REMOTE_ADDR"] ;}else {$ cip = '';} preg_match ("/[\ d \.] {7, 15}/", $ cip, $ cips); $ cip = isset ($ cips [0])? $ Cips [0]: 'unknown '; unset ($ cips); return $ cip;}?>

I hope this article will help you with php programming.

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