php获取客户端ip地址的代码

<?php
//取得客户端IP的函数
function get_client_ip() {
$ip = $_SERVER['REMOTE_ADDR'];
if (isset($_SERVER['HTTP_CLIENT_IP']) && preg_match(‘/^([0-9]{1,3}.){3}[0-9]{1,3}$/’, $_SERVER['HTTP_CLIENT_IP'])) {
$ip = $_SERVER['HTTP_CLIENT_IP'];
} elseif(isset($_SERVER['HTTP_X_FORWARDED_FOR']) && preg_match_all(‘#d{1,3}.d{1,3}.d{1,3}.d{1,3}#s’, $_SERVER['HTTP_X_FORWARDED_FOR'], $matches)) {
foreach ($matches[0] AS $xip) {
if (!preg_match(‘#^(10|172.16|192.168).#’, $xip)) {
$ip = $xip;
break;
}
}
}
return $ip;
}
?>