获取客户端IP

[php]代码库

//获取客户端IP地址
function getIP()
{
	  $remoteip = "";
	  if(getenv('HTTP_CLIENT_IP')) { 
		  $remoteip = getenv('HTTP_CLIENT_IP');
	  } elseif(getenv('HTTP_X_FORWARDED_FOR')) { 
		  $remoteip = getenv('HTTP_X_FORWARDED_FOR');
	  } elseif(getenv('REMOTE_ADDR')) { 
		  $remoteip = getenv('REMOTE_ADDR');
	  } else { 
		  $remoteip = $HTTP_SERVER_VARS['REMOTE_ADDR'];
	  }
	  
	  return $remoteip;
}