PHP / Image Loader

<?php

//--------------------------------------
 if (isset($_GET['url'])) {

      $ch = curl_init();
      //curl_setopt($ch, CURLOPT_HEADER,1);

      curl_setopt($ch, CURLOPT_URL, $_GET['url']);
      curl_setopt($ch, CURLOPT_TIMEOUT, 10);
      curl_setopt($ch, CURLOPT_FOLLOWLOCATION,1);
      curl_setopt($ch, CURLOPT_USERAGENT,
       "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727)");


      curl_setopt($ch,CURLOPT_ENCODING, 1);
      curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);

      $teststr = curl_exec($ch);

     if(curl_exec($ch) === false)
       {
       echo 'Ошибка curl: ' . curl_error($ch);
      }

      curl_close($ch);
      header('content-type: image/jpeg');
      $seconds_to_cache = 3600*24*60;
      $ts = gmdate("D, d M Y H:i:s", time() + $seconds_to_cache) . " GMT";
      header("Expires: $ts");
      header("Pragma: cache");
      header("Cache-Control: max-age=$seconds_to_cache");

      echo $teststr;
      exit();

   }

//--------------------------------------
  if (isset($_GET['thumb'])) {

      $url = $_GET['thumb'];

      //$time_prev = microtime(true);

      $ch=curl_init();
      curl_setopt($ch, CURLOPT_URL, $url);
      curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
      curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 30);

      curl_setopt($ch, CURLOPT_USERAGENT,
      'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/536.11 (KHTML, like Gecko)'.
                                  ' Chrome/20.0.1132.57 Safari/536.11');

      $data=curl_exec($ch);
      curl_close($ch);

      /*$time= microtime(true)-$time_prev;
      echo sprintf("time: %f",$time).'<br/>';
      $time_prev = microtime(true);*/

      list($w,$h)=getimagesize($url);

      /*$time= microtime(true)-$time_prev;
      echo sprintf("time size: %f",$time).'<br/>';
      $time_prev = microtime(true);*/

      if (isset($_GET['nw'])) {

         $nw = $_GET['nw'];
         $nh = $h*($nw/$w);
      }
       else

         if (isset($_GET['nh'])) {

            $nh = $_GET['nh'];
            $nw = $w*($nh/$h);

         } else {

               $nw=300;
               $nh=$h*($nw/$w);
           }

      $thumb=imagecreatetruecolor($nw,$nh);
      $source=imagecreatefromjpeg('data://image/jpeg;base64,'.base64_encode($data));
      imagecopyresampled($thumb,$source,0,0,0,0,$nw,$nh,$w,$h);

      ob_start ();

      imagejpeg ($thumb);
      $image_data = ob_get_contents ();
      ob_end_clean ();


      imagedestroy($source);
      imagedestroy($thumb);

      /*$time= microtime(true)-$time_prev;
      echo sprintf("time resample: %f",$time).'<br/>';
      $time_prev = microtime(true);*/

      //$outstr='data:img/jpeg;base64,'.base64_encode($image_data);

      header('content-type: image/jpeg');
      $seconds_to_cache = 3600*24*60;
      $ts = gmdate("D, d M Y H:i:s", time() + $seconds_to_cache) . " GMT";
      header("Expires: $ts");
      header("Pragma: cache");
      header("Cache-Control: max-age=$seconds_to_cache");

      echo $image_data;

}









?>