如何在php中獲取客戶端的公共ip

Question

我必須在php中獲取遠程系統的公共IP。 我試過

$_SERVER['REMOTE_ADDR'] 

getenv('REMOTE_ADDR'); 

但是總是返回私有IP。幫助解決它。

Answer 1

試試這個：

$ip = !empty($_SERVER['HTTP_CLIENT_IP']) ? $_SERVER['HTTP_CLIENT_IP'] : (!empty($_SERVER['HTTP_X_FORWARDED_FOR']) ? $_SERVER['HTTP_X_FORWARDED_FOR'] : $_SERVER['REMOTE_ADDR']); 

警告：你應該繼承它和消毒，因爲頭可以很容易地操縱。

Answer 2

private function getIP() 
{ 
    $client = @$_SERVER['HTTP_CLIENT_IP']; 
    $forward = @$_SERVER['HTTP_X_FORWARDED_FOR']; 
    $remote = $_SERVER['REMOTE_ADDR']; 

    if(filter_var($client, FILTER_VALIDATE_IP)) 
    { 
     $ip = $client; 
    } 
    elseif(filter_var($forward, FILTER_VALIDATE_IP)) 
    { 
     $ip = $forward; 
    } 
    else 
    { 
     $ip = $remote; 
    } 

    return $ip; 
} 
echo getIP();