PHP获取用户IP代码实现

/**<br />		 * 获取客户IP地址<br />		 * @return $ip<br />		 */<br />	    function getIp(){<br />	    	if(!empty($_SERVER["HTTP_CLIENT_IP"])){<br />			  $ip = $_SERVER["HTTP_CLIENT_IP"];<br />			}<br />			elseif(!empty($_SERVER["HTTP_X_FORWARDED_FOR"])){<br />			  $ip = $_SERVER["HTTP_X_FORWARDED_FOR"];<br />			}<br />			elseif(!empty($_SERVER["REMOTE_ADDR"])){<br />			  $ip = $_SERVER["REMOTE_ADDR"];<br />			}<br />			else{<br />			  $ip = "127.0.0.1";<br />			}<br />			return $ip;<br />	    }