php file that will resize images on the fly

thumb.php

<?php
#error_reporting(E_ALL);
#ini_set('display_errors', '1');

$src = $_GET["src"];
$wmax = $_GET["wmax"];
$hmax = $_GET["hmax"];
$quality = $_GET["quality"];
$bgcol = $_GET["bgcol"];

#$src = str_replace("images.bidboxr.com","127.0.0.1",$src);
#$src = str_replace("badcheese.dyndns.org","127.0.0.1",$src);
#$src = str_replace("localhost","127.0.0.1",$src);

if (preg_match('/\.gif$/i', $src)) {
  $source = imagecreatefromgif($src);
} elseif (preg_match('/\.jp(|e)g$/i', $src)) {
  $source = imagecreatefromjpeg($src);
} elseif (preg_match('/\.png$/i', $src)) {
  $source = imagecreatefrompng($src);
} else {
  $info = getimagesize($src);
  $mime_type = image_type_to_mime_type($info[2]);

  switch($mime_type) {
    case "image/gif":
      $source = imagecreatefromgif($src);
      break;
    case "image/jpeg":
    case "image/jpg":
      $source = imagecreatefromjpeg($src);
      break;
    case "image/png":
      $source = imagecreatefrompng($src);
      break;
    case "image/xbm":
      $source = imagecreatefromxbm($src);
      break;
    default:
      if (!$source) {
        $source = imagecreatefromjpeg("./notfound.jpg");
      }
  }
  if (!$source) {
        $source = imagecreatefromjpeg("./notfound.jpg");
  }
}

Header ("Content-type: image/jpeg");
Header ("Last-Modified: " . gmdate("D, d M Y H:i:s",mktime (0,0,0,1,1,2000)) . " GMT");
Header ("Expires: Mon, 26 Jul 2040 05:00:00 GMT");
#Header ("Cache-Control: max-age=10000000, s-maxage=1000000, proxy-revalidate, must-revalidate");
Header ("Cache-Control: max-age=1000000, s-maxage=1000000");

   $orig_w=imagesx($source);
   $orig_h=imagesy($source);

   if ($orig_w>$wmax || $orig_h>$hmax) {
       $thumb_w=$wmax;
       $thumb_h=$hmax;
       if ($thumb_w/$orig_w*$orig_h>$thumb_h)
           $thumb_w=round($thumb_h*$orig_w/$orig_h);
       else
           $thumb_h=round($thumb_w*$orig_h/$orig_w);
   } else {
       $thumb_w=$orig_w;
       $thumb_h=$orig_h;
   }
   if (!@$bgcol) {
       $thumb=imagecreatetruecolor($thumb_w,$thumb_h);
       imagecopyresampled($thumb,$source,
                           0,0,0,0,$thumb_w,$thumb_h,$orig_w,$orig_h);
   } else {
       $thumb=imagecreatetruecolor($wmax,$hmax);
       imagefilledrectangle($thumb,0,0,$wmax-1,$hmax-1,intval($bgcol,16));
       imagecopyresampled($thumb,$source,
                           round(($wmax-$thumb_w)/2),round(($hmax-$thumb_h)/2),
                           0,0,$thumb_w,$thumb_h,$orig_w,$orig_h);
   }
   if (!@$quality) $quality=90;
   imagejpeg($thumb,"",$quality);
   imagedestroy($thumb);
?>

Need to fix the bgcol stuff - it's not working at this moment. For now, just leave that part out.