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PHP如何获取用户的的真实IP地址

PHPz

May 25, 2016 pm 05:09 PM

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这篇文章主要介绍了如何用PHP获取用户的的真实IP地址，有一定的参考价值，感兴趣的朋友可以看看。

/*
 * 获取用户IP的函数
 */
function getIp(){
	$onlineip = "";
	if(getenv(&#39;HTTP_CLIENT_IP&#39;) && strcasecmp(getenv(&#39;HTTP_CLIENT_IP&#39;), &#39;unknown&#39;)) {
	    $onlineip = getenv(&#39;HTTP_CLIENT_IP&#39;);
	} elseif(getenv(&#39;HTTP_X_FORWARDED_FOR&#39;) && strcasecmp(getenv(&#39;HTTP_X_FORWARDED_FOR&#39;), &#39;unknown&#39;)) {
	    $onlineip = getenv(&#39;HTTP_X_FORWARDED_FOR&#39;);
	} elseif(getenv(&#39;REMOTE_ADDR&#39;) && strcasecmp(getenv(&#39;REMOTE_ADDR&#39;), &#39;unknown&#39;)) {
	    $onlineip = getenv(&#39;REMOTE_ADDR&#39;);
	} elseif(isset($_SERVER[&#39;REMOTE_ADDR&#39;]) && $_SERVER[&#39;REMOTE_ADDR&#39;] && strcasecmp($_SERVER[&#39;REMOTE_ADDR&#39;], &#39;unknown&#39;)) {
	    $onlineip = $_SERVER[&#39;REMOTE_ADDR&#39;];
	}
	return $onlineip;
}

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