php判断访问IP的方法
本文实例讲述了php判断访问IP的方法。分享给大家供大家参考。具体如下：
<?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;
}
?>
希望本文所述对大家的php程序设计有所帮助。