php 获取当前用户的IP

代码如下：

<?php
   if($_SERVER['HTTP_CLIENT_IP']){
     $onlineip=$_SERVER['HTTP_CLIENT_IP'];
}elseif($_SERVER['HTTP_X_FORWARDED_FOR']){
     $onlineip=$_SERVER['HTTP_X_FORWARDED_FOR'];
}else{
     $onlineip=$_SERVER['REMOTE_ADDR'];
}
/* 何问起 hovertree.com */

echo $onlineip;

?>

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