php获取用户(客户端)真实IP地址的两种方法
第一种方法,还算靠谱,本人以前一直用的是这个方法:
function get_real_ip(){ $ip=false; if(!empty($_SERVER['HTTP_CLIENT_IP'])){ $ip=$_SERVER['HTTP_CLIENT_IP']; } if(!empty($_SERVER['HTTP_X_FORWARDED_FOR'])){ $ips=explode (', ', $_SERVER['HTTP_X_FORWARDED_FOR']); if($ip){ array_unshift($ips, $ip); $ip=FALSE; } for ($i=0; $i < count($ips); $i++){ if(!preg_match ('/^(10│172.16│192.168)./', $ips[$i])){ $ip=$ips[$i]; break; } } } return ($ip ? $ip : $_SERVER['REMOTE_ADDR']); }
第二种方法:
function get_real_ip(){ static $realip; if(isset($_SERVER)){ if(isset($_SERVER['HTTP_X_FORWARDED_FOR'])){ $realip=$_SERVER['HTTP_X_FORWARDED_FOR']; }else if(isset($_SERVER['HTTP_CLIENT_IP'])){ $realip=$_SERVER['HTTP_CLIENT_IP']; }else{ $realip=$_SERVER['REMOTE_ADDR']; } }else{ if(getenv('HTTP_X_FORWARDED_FOR')){ $realip=getenv('HTTP_X_FORWARDED_FOR'); }else if(getenv('HTTP_CLIENT_IP')){ $realip=getenv('HTTP_CLIENT_IP'); }else{ $realip=getenv('REMOTE_ADDR'); } } return $realip; }
第三种方法,摘自DISCUZ,应该还不错吧!
// 获取IP地址(摘自discuz) function getIp(){ $ip='未知IP'; if(!empty($_SERVER['HTTP_CLIENT_IP'])){ return is_ip($_SERVER['HTTP_CLIENT_IP'])?$_SERVER['HTTP_CLIENT_IP']:$ip; }elseif(!empty($_SERVER['HTTP_X_FORWARDED_FOR'])){ return is_ip($_SERVER['HTTP_X_FORWARDED_FOR'])?$_SERVER['HTTP_X_FORWARDED_FOR']:$ip; }else{ return is_ip($_SERVER['REMOTE_ADDR'])?$_SERVER['REMOTE_ADDR']:$ip; } } function is_ip($str){ $ip=explode('.',$str); for($i=0;$i<count($ip);$i++){ if($ip[$i]>255){ return false; } } return preg_match('/^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$/',$str); }