<?php

   $folder = '.';


    $extList = array();
   $extList['gif'] = 'image/gif';
   $extList['jpg'] = 'image/jpeg';
   $extList['jpeg'] = 'image/jpeg';
   $extList['png'] = 'image/png';
   $extList['PNG'] = 'image/PNG';
   

// You don't need to edit anything after this point.


// --------------------- END CONFIGURATION -----------------------

$img = null;

if (substr($folder,-1) != '/') {
   $folder = $folder.'/';
}

if (isset($_GET['img'])) {
   $imageInfo = pathinfo($_GET['img']);
   if (
       isset( $extList[ strtolower( $imageInfo['extension'] ) ] ) &&
        file_exists( $folder.$imageInfo['basename'] )
    ) {
      $img = $folder.$imageInfo['basename'];
   }
} else {
   $fileList = array();
   $handle = opendir($folder);
   while ( false !== ( $file = readdir($handle) ) ) {
      $file_info = pathinfo($file);
      if (
          isset( $extList[ strtolower( $file_info['extension'] ) ] )
      ) {
         $fileList[] = $file;
      }
   }
   closedir($handle);

   if (count($fileList) > 0) {
      $imageNumber = time() % count($fileList);
      $img = $folder.$fileList[$imageNumber];
   }
}

if ($img!=null) {
   $imageInfo = pathinfo($img);
   $contentType = 'Content-type: '.$extList[ $imageInfo['extension'] ];
   header ($contentType);
   readfile($img);
} else {
   if ( function_exists('imagecreate') ) {
      header ("Content-type: image/png");
      $im = @imagecreate (100, 100)
          or die ("Cannot initialize new GD image stream");
      $background_color = imagecolorallocate ($im, 255, 255, 255);
      $text_color = imagecolorallocate ($im, 0,0,0);
      imagestring ($im, 2, 5, 5,  "IMAGE ERROR", $text_color);
      imagepng ($im);
      imagedestroy($im);
   }
}

?>

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