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iis下面php getenv(‘HTTP_X_FORWARDED_FOR’)取不到ip

2009年4月16日龙飞发表评论阅读评论

环境是win2003 iis6 php(isapi)
应用是个dz，最近在上了cdn后发现用户过来的ip都是squid服务器的地址，看了下dz的源代码

if(getenv('HTTP_CLIENT_IP') && strcasecmp(getenv('HTTP_CLIENT_IP'), 'unknown')) {
	$onlineip = getenv('HTTP_CLIENT_IP');
} elseif(getenv('HTTP_X_FORWARDED_FOR') && strcasecmp(getenv('HTTP_X_FORWARDED_FOR'), 'unknown')) {
	$onlineip = getenv('HTTP_X_FORWARDED_FOR');
} elseif(getenv('REMOTE_ADDR') && strcasecmp(getenv('REMOTE_ADDR'), 'unknown')) {
	$onlineip = getenv('REMOTE_ADDR');
} elseif(isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], 'unknown')) {
	$onlineip = $_SERVER['REMOTE_ADDR'];
}

对比了下另外一台linux的机器发现是可以取到的。
于是用_SERVER["HTTP_X_FORWARDED_FOR"]试了试是可以取到用户ip的，难道在windows下面不能用getenv？
最后略微修改了下dz的代码搞定了

if(getenv('HTTP_CLIENT_IP') && strcasecmp(getenv('HTTP_CLIENT_IP'), 'unknown')) {
	$onlineip = getenv('HTTP_CLIENT_IP');
} elseif(getenv('HTTP_X_FORWARDED_FOR') && strcasecmp(getenv('HTTP_X_FORWARDED_FOR'), 'unknown')) {
	$onlineip = getenv('HTTP_X_FORWARDED_FOR');
} elseif($_SERVER["HTTP_X_FORWARDED_FOR"] && strcasecmp($_SERVER["HTTP_X_FORWARDED_FOR"], 'unknown')) {
	$onlineip = $_SERVER["HTTP_X_FORWARDED_FOR"];
} elseif(getenv('REMOTE_ADDR') && strcasecmp(getenv('REMOTE_ADDR'), 'unknown')) {
	$onlineip = getenv('REMOTE_ADDR');
} elseif(isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], 'unknown')) {
	$onlineip = $_SERVER['REMOTE_ADDR'];
}