php获取访问者真实ip地址

2014-05-05 为码而活 PHP教程 关注426次 已收录
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正文概述

在很我的时候我们需要得到用户的真实ip地址，例如，日志记录，地理定位，将用户信息，网站数据分析等,其实获取ip地址很简单$_server['remote_addr']就可以了。

  1. //最简单的方法 
  2. $ip = $_server['remote_addr']; 
  3. //上面的方法只要使用了代理你就无法得到真实ip地址，下面有更详细的方法 
  4. echo "remote addr: " . $_server['remote_addr']."<br/>"; 
  5. echo "x forward: " . $_server['http_x_forwarded_for']."<br/>"; 
  6. echo "clien ip: " . $_server['http_client_ip']."<br/>"; 
  7. //好了来看一个实例。 
  8. function getip() {     
  9.  $ip = $_server['remote_addr'];      
  10.  if (!emptyempty($_server['http_client_ip'])) {         
  11.   $ip = $_server['http_client_ip'];     
  12.  } elseif (!emptyempty($_server['http_x_forwarded_for'])) {         
  13.   $ip = $_server['http_x_forwarded_for'];     
  14.  }     
  15.   return $ip; 
  16. } 
  17. /* 

如果是是加密的代理是无法获取真实ip地址的。

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