<?

  $proxy_headers = array(
        'CLIENT_IP',
        'FORWARDED',
        'FORWARDED_FOR',
        'FORWARDED_FOR_IP',
        'HTTP_CLIENT_IP',
        'HTTP_FORWARDED',
        'HTTP_FORWARDED_FOR',
        'HTTP_FORWARDED_FOR_IP',
        'HTTP_PC_REMOTE_ADDR',
        'HTTP_PROXY_CONNECTION',
        'HTTP_VIA',
        'HTTP_X_FORWARDED_FOR',
        'HTTP_X_FORWARDED',
        'VIA',
        'X_FORWARDED_FOR',
        'X_FORWARDED',
    );
    
    $detected_headers = array();

    $host_ip = $_SERVER['REMOTE_ADDR'];
    $hidden_ip = "0.0.0.0";
    $proxy_detected = false;
    
    foreach($proxy_headers as $x){
        if (isset($_SERVER[$x])) {
    	    $proxy_detected = true;
    	    $detected_headers[$x] = $_SERVER[$x];
    	    if (ereg("[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+", $_SERVER[$x])) {
//    		echo "IP found: ";
    		if ($host_ip != $_SERVER[$x]) {
    		    $hidden_ip = $_SERVER[$x];
    		}
    	    }
//    	    echo "$x=$_SERVER[$x]; ";    	    
    	}
    }
//    echo "\r\n";
    echo '{"proxy_detected":"'.($proxy_detected?'true':'false').'","host_ip":"'.$host_ip.'","hidden_ip":"'.$hidden_ip.'"';

    echo ',"detected_headers":"';
    foreach($detected_headers as $key => $value){
        echo $key.'='.$value.';';
    }
    echo '"';        

    echo ',"all_headers":"';
    foreach ($_SERVER as $key => $value) { 
      echo $key.'='.$value.';';
    } 
    echo '"';        
    echo "}";

?>