<?php
$ip = $_GET['ip'];
$port = $_GET['port'];
$offline_PIC = $_GET['offI'];
$online_PIC = $_GET['onI'];
$fp = @fsockopen($ip, $port, &$errno, &$errstr, 30);
if (!$fp) {
    $usedPic = $offline_PIC;
//    die($errstr);
} else {
    $usedPic = $online_PIC;
    fclose($fp);
}

if (!$imageType=@getimagesize($usedPic)) {
    $imageType[2] == 4;
}

if ($imageType[2] == 1) {
    //GIF
    header("Content-Type: image/gif");
    $img = imagecreatefromgif ($usedPic);
    imagegif ($img);
} else if ($imageType[2] == 2) {
    //JPG
    header("Content-Type: image/jpeg");
    $img = imagecreatefromjpeg($usedPic);
    imagejpeg($img);
} else if ($imageType[2] == 3) {
    //PNG
    header("Content-Type: image/png");
    $img = imagecreatefrompng($usedPic);
    imagepng($img);
} else {
    header("Content-Type: image/gif");
    $im = imagecreatetruecolor(150, 30);
    $bgc = imagecolorallocate($im, 255, 255, 255);
    $tc = imagecolorallocate($im, 0, 0, 0);
    imagefilledrectangle($im, 0, 0, 150, 30, $bgc);
    imagestring($im, 1, 5, 5, "Error!", $tc);
    imagegif ($im);
}
?>