showpic.php

<?php

$use_resampling = true;

//

// Create True Color Thumbnails? Better quality overall but set to false if you

// have GD version < 2.01 or if creating transparent thumbnails.

$use_truecolor = true;

//

// Output GIFs as JPEGS? Set this option to true if you have GD version > 1.6

// and want to output GIF thumbnails as JPGs instead of GIFs or PNGs. Note that your

// GIF transparencies will not be retained in the thumbnail if you output them

// as JPGs. If you have GD Library < 1.6 with GIF create support, GIFs will

// be output as GIFs. Set the "matte" color below if setting this option to true.

$gif_as_jpeg = false;

//

// Cache Images on the server? Set to true if you want to save requested thumbnails

// on disk. This will add to disk space but will save your processor from having to

// create the thumbnail for every visitor.

$tn_server_cache = false;

//

// Thumbnail Path. If server-caching is enabled, specify a sub-directory

// where the thumbnails should be kept. Use '' for the default images-directory,

// which is /catalog/images/

// Note: Make sure this path actually exists as a subdirectory and is writeable!

$tn_path = ''; // The default is 'thumbnails/', should be chmod 777

//

// Cache Images in Browser-Cache? Set to true if you want browsers to be able to

// cache viewed thumbnails in their own cache. This will save bandwidth for every

// visitor that views the same thumbnail again.

$tn_browser_cache = true; // The default is true

//

// Send a 404 http response when an image is not found

// If set to false, will show a small error-image (as in version < 2.0.0)

$use404 = true; // The default is true

//

// Define RGB Color Value for background matte color if outputting GIFs as JPEGs

// Example: white is r=255, b=255, g=255; black is r=0, b=0, g=0; red is r=255, b=0, g=0;

$r = 255; // Red color value (0-255)

$g = 255; // Green color value (0-255)

$b = 255; // Blue color value (0-255)

//

// Allow the creation of thumbnail images that are larger than the original images:

$allow_larger = false; // The default is false.

// If allow_larger is set to false, you can opt to output the original image:

// Better leave it true if you want pixel_trans_* to work as expected

$show_original = true; // The default is true.

//

// END CONFIGURATION SETTINGS



// Note: In order to manually debug this script, you might want to comment

// some header() lines -- otherwise no output is shown.



// reverse strrchr(), taken from http://nl2.php.net/manual/en/function.strrchr.php


  if(file_exists($_GET["img"]))
  {
  
  $current_size = getimagesize($_GET["img"]); 
  $current_img_width = $current_size[0]; 
  $current_img_height = $current_size[1]; 
      
         // Proportionally resize the image to the
         // max sizes specified above
         $max_width=$_GET["mw"];
     $max_height=$_GET["mh"];
     $width=$current_img_width;
     $height=$current_img_height;
         $x_ratio = $max_width / $width;
         $y_ratio = $max_height / $height;

         if( ($width <= $max_width) && ($height <= $max_height) )
         {
               $tn_width = $width;
               $tn_height = $height;
         }
         elseif (($y_ratio * $height) < $max_height)
         {
               $tn_width = ceil($max_width);
               $tn_height = $max_width / '1';                              
         }
         elseif (($y_ratio * $height) < $max_height)
         {
               $tn_width = ceil($max_width);
               $tn_height = $max_width / '1';                              
         }
         elseif ($max_width == $max_height)
         {
               $tn_width = ceil($max_width);
               $tn_height = $max_width / '1';                              
         }
         else
         {
               $tn_width = ceil($max_width);
               $tn_height = $max_width / '1.78';
                                             
         }
  $new_img_width = $tn_width; 
    $new_img_height =$tn_height;
    $_GET["w"]=$new_img_width;
    $_GET["h"]=$new_img_height;
    
  }
function reverse_strrchr($haystack, $needle)

{

  return strrpos($haystack, $needle) ? substr($haystack, 0, strrpos($haystack, $needle) +1 ) : false;

} 



function modify_tn_path($file)

{

  global $tn_path;

  

  if ($tn_path=='') return $file;

  else{

    // append the thumbnail-path to the path

    $pathSep = strstr(PHP_OS, "WIN") ? "\\" : "/";;

    $path = reverse_strrchr($file,$pathSep);

    if ($path===false) return $tn_path . $file;

    else return str_replace($path,$path . $tn_path,$file);

  }

}



function http_headers($file='')

{

  //

  // This function supports the use of browser-caching (optional)

  //

  // A 304 (Not Modified) will be sent when the thumbnail has not changed

  //       since the time it was last cached by the client

  // A 200 (OK) will be sent when the thumbnail was not cached by the client

  //       or when the thumbnail was cached but changed afterwards

  // A 404 (Not Found) will be sent when the thumbnail is not found (optional)

  global $use404, $tn_browser_cache;

  

  if (isset($_SERVER["SERVER_PROTOCOL"]) && $_SERVER["SERVER_PROTOCOL"] == "HTTP/1.1") 

    $httpProtocol = "HTTP/1.1";

  else

    $httpProtocol = "HTTP/1.0";

  

  if (file_exists($file))

  {

    

    if (isset ($_SERVER["HTTP_CACHE_CONTROL"])) {

      $tn_browser_cache = strtolower($_SERVER["HTTP_CACHE_CONTROL"]) == "no-cache" ? false : $tn_browser_cache ;

    }

    

    //Build our entity tag, which is "inode-lastmodtime-filesize"

    $lastModified = filemtime($file);

    $lastModifiedGMT = $lastModified - date('Z');

    $lastModifiedHttpFormat = gmstrftime("%a, %d %b %Y %T %Z", $lastModified);

    // Don't use inode in eTag when you have multiple webservers, instead I use a dummy value (1fa44b7)

    $eTag = '"1fa44b7-' . dechex(filesize($file)) . "-" . dechex($lastModifiedGMT) . '"';

  

    if ($tn_browser_cache){

    

      $lastModifiedFromHttp = "xxx";

      if (isset ($_SERVER["HTTP_IF_MODIFIED_SINCE"])) {

        $lastModifiedFromHttp = ($_SERVER["HTTP_IF_MODIFIED_SINCE"] === "") ? "xxx" : $_SERVER["HTTP_IF_MODIFIED_SINCE"] ;

      }

      

      // Read sent eTag by browser

      $foundETag = "";

      if (isset ($_SERVER["HTTP_IF_NONE_MATCH"])) {

        $foundETag = stripslashes($_SERVER["HTTP_IF_NONE_MATCH"]);

      }

      

      // Last Modification Time

      if ($lastModifiedFromHttp == $lastModifiedHttpFormat) {

        $sameLastModified = true;

      }

      elseif (strpos($lastModifiedFromHttp,$lastModifiedHttpFormat) !== false){

        $sameLastModified = true;

      }

      else {

        $sameLastModified = false;

      }

      

      if (($eTag == $foundETag) && $sameLastModified){

        // same eTag and Last Modification Time (e.g. with Firefox)

        $is304 = true;

      }

      else

        // no eTag supplied, but Last Modification Time is unchanged (e.g. with IE 6.0)

        $is304 = (($foundETag == "") && $sameLastModified);



      if ($is304)

      {

        //

        // They already have an up to date copy so tell them

        if ($lastModifiedGMT > 946080000) {        // 946080000 = Dec 24, 1999 4PM

          // only send if valid eTag

          header("ETag: " . $eTag);

        }

        header("Status: 304 Not Modified");

        header($httpProtocol . " 304 Not Modified");

        header("Connection: close");

        exit();

      }

    }



    //

    // We have to send them the whole page

    header('Pragma: ');

    header('Expires: ');

    if ($tn_browser_cache){

      if ($lastModifiedGMT > 946080000) {        // 946080000 = Dec 24, 1999 4PM

        header('ETag: ' . $eTag);

      }

      header('Last-Modified: ' . $lastModifiedHttpFormat);

      header('Cache-Control: private');

    }

    else {

      header('Cache-Control: no-cache');

    }



  }

  else

  {

    if ($use404)

    {

      //

      // send them a 404 http response header

      header("TEST404: TEST404");

      header("Status: 404 Not Found");

      header($httpProtocol . " 404 Not Found");

      exit();

    }

    else

    {

      //

      // show a custom error-image (non-cacheable by the browser)     

      header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");               // Date in the past

      header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");  // Always modified

      header("Cache-Control: no-store, no-cache, must-revalidate");   // HTTP/1.1

      header("Cache-Control: post-check=0, pre-check=0", false);      // HTTP/1.1

      header("Pragma: no-cache");                                     // HTTP/1.0

      header('Content-type: image/jpeg');
      header('Content-type: image/gif');

      $src = imagecreate($_GET['w'], $_GET['h']);                     // Create a blank image.

      $bgc = imagecolorallocate($src, 255, 255, 255);

      $tc  = imagecolorallocate($src, 0, 0, 0);

      imagefilledrectangle($src, 0, 0, $_GET['w'], $_GET['h'], $bgc);

      imagestring($src, 1, 5, 5, 'Error', $tc);

      imagejpeg($src, '', 100);

      imagedestroy($src);

      exit();

    }

  }

}



// Get the size of the image:

$image = @getimagesize($_GET['img']);



// Check the input variables and decide what to do:

if (empty($image) || empty($_GET['w']) || empty($_GET['h']) || (empty($allow_larger) && ($_GET['w'] > $image[0] || $_GET['h'] > $image[1])))

{

  if (empty($image) || empty($show_original))

  {

    http_headers();

  }

  else

  {

    // 2Do: Return the original image w/o making a copy (as that is what we currently do):

    $_GET['w'] = $image[0];

    $_GET['h'] = $image[1];

  }

}



// Create appropriate image header:

if ($image[2] == 2 || ($image[2] == 1 && $gif_as_jpeg))

{

  header('Content-type: image/jpeg');

  if ($tn_server_cache) $filename = modify_tn_path($_GET['img'] .'.thumb_'.$_GET['w'].'x'.$_GET['h'].'.jpg');

}

elseif ($image[2] == 1 && function_exists('imagegif'))

{

  header('Content-type: image/gif');

  if ($tn_server_cache) $filename = modify_tn_path($_GET['img'] .'.thumb_'.$_GET['w'].'x'.$_GET['h'].'.gif');

}

elseif ($image[2] == 3 || $image[2] == 1)

{

  header('Content-type: image/png');

  if ($tn_server_cache) $filename = modify_tn_path($_GET['img'] .'.thumb_'.$_GET['w'].'x'.$_GET['h'].'.png');

}



// If you are required to set the full path for file_exists(), set this:

// $filename = '/your/path/to/catalog/'.$filename;



if (file_exists($filename) && $tn_server_cache && filemtime($filename) > filemtime($_GET['img']))

{

  // Output Cache Headers

  http_headers($filename);

  

  if ($image[2] == 2 || ($image[2] == 1 && $gif_as_jpeg))

  {

    $src = imagecreatefromjpeg($filename);

    imagejpeg($src, '', 100);

  }

  elseif ($image[2] == 1 && function_exists('imagegif'))

  {

    $src = imagecreatefromgif($filename);

    imagegif($src);

  }

  elseif ($image[2] == 3 || $image[2] == 1)

  {

    $src = imagecreatefrompng($filename);

    imagepng($src);

  }

  else

  {

    // Not an image or imagecreatefrom...-function does not exits.

    // Let's output an error

    http_headers();

  }

}

else

{

  // Create a new, empty image based on settings:

  if (function_exists('imagecreatetruecolor') && $use_truecolor && ($image[2] == 2 || $image[2] == 3))

  {

    $tmp_img = imagecreatetruecolor($_GET['w'],$_GET['h']);

  }

  else

  {

    $tmp_img = imagecreate($_GET['w'],$_GET['h']);

  }



  $th_bg_color = imagecolorallocate($tmp_img, $r, $g, $b);



  imagefill($tmp_img, 0, 0, $th_bg_color);

  imagecolortransparent($tmp_img, $th_bg_color);



  // Create the image to be scaled:

  if ($image[2] == 2 && function_exists('imagecreatefromjpeg'))

  {

    $src = imagecreatefromjpeg($_GET['img']);

  }

  elseif ($image[2] == 1 && function_exists('imagecreatefromgif'))

  {

    $src = imagecreatefromgif($_GET['img']);

  }

  elseif (($image[2] == 3 || $image[2] == 1) && function_exists('imagecreatefrompng'))

  {

    $src = imagecreatefrompng($_GET['img']);

  }

  else

  {

    // Not an image or imagecreatefrom...-function does not exits.

    // Let's output an error

    http_headers();

  }



  // Scale the image based on settings:

  if (function_exists('imagecopyresampled') && $use_resampling)

  {

    imagecopyresampled($tmp_img, $src, 0, 0, 0, 0, $_GET['w'], $_GET['h'], $image[0], $image[1]);

  }

  else

  {

    imagecopyresized($tmp_img, $src, 0, 0, 0, 0, $_GET['w'], $_GET['h'], $image[0], $image[1]);

  }



  // Output the image:

  if ($image[2] == 2 || ($image[2] == 1 && $gif_as_jpeg))

  {

    if ($tn_server_cache)

    {

      $thumbnail = modify_tn_path($_GET['img'].'.thumb_'.$_GET['w'].'x'.$_GET['h'].'.jpg');

      imagejpeg($tmp_img,$thumbnail, 100);

      http_headers($thumbnail);

    }

    else

    {

      http_headers($_GET['img']);

    }

    imagejpeg($tmp_img, '', 100);

  }

  elseif ($image[2] == 1 && function_exists('imagegif'))

  {

    if ($tn_server_cache)

    {

      $thumbnail = modify_tn_path($_GET['img'].'.thumb_'.$_GET['w'].'x'.$_GET['h'].'.gif');

      imagegif($tmp_img,$thumbnail);

      http_headers($thumbnail);

    }

    else

    {

      http_headers($_GET['img']);

    }

    imagegif($tmp_img);

  }

  elseif ($image[2] == 3 || $image[2] == 1)

  {

    if ($tn_server_cache)

    {

      $thumbnail = modify_tn_path($_GET['img'].'.thumb_'.$_GET['w'].'x'.$_GET['h'].'.png');

      imagepng($tmp_img,$thumbnail);

      http_headers($thumbnail);

    }

    else

    {

      http_headers($_GET['img']);

    }

    imagepng($tmp_img);

  }

  else

  {

    // Not an image or image...-function not supported

    // Let's output an error:

    http_headers();

  }



  // Clear the image from memory:

  imagedestroy($src);

  imagedestroy($tmp_img);

}