PHPでクライアントIPアドレスを取得するサンプルコード

2015年9月9日

方法1
function get_real_ipstartnews24(){
$ip=false;
if(!empty($_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(!eregi ('^(10│172.16│192.168).’, $ips[$i])){
$ip=$ips[$i];
break;
}
}
}
return ($ip ? $ip : $_SERVER['REMOTE_ADDR’]);
}
方法2
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);
}
方法3
function get_real_ip_startnews24(){
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;
}