获取登陆用户的ip
function getip(){ static $ip = null; if($ip !=null) return $ip; if(getenv('REMOTE_ADDR')) $ip = sprintf('%u',ip2long(getenv('REMOTE_ADDR'))); elseif(getenv('HTTP_CLIENT_IP')) $ip = sprintf('%u',ip2long(getenv('HTTP_CLIENT_IP'))); elseif(getenv('HTTP_X _FORWARAED_FOR')) $ip = sprintf('%u',ip2long(getenv('HTTP_X _FORWARAED_FOR'))); return $ip; }
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