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PHP获取真实IP，即便他使用代理

[PHP]代码
  1. function getRealIpAddr()
  2. {
  3. if (!empty($_SERVER['HTTP_CLIENT_IP']))
  4. {
  5. $ip=$_SERVER['HTTP_CLIENT_IP'];
  6. }
  7. elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR']))
  8. //检查IP是从代理传递
  9. {
  10. $ip=$_SERVER['HTTP_X_FORWARDED_FOR'];
  11. }
  12. else
  13. {
  14. $ip=$_SERVER['REMOTE_ADDR'];
  15. }
  16. return $ip;
  17. }
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