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CreateThumbs Script

Created as a 'companion script' to go with my One File PHP Photo Gallery this script can be dropped in a web folder with your main photos and of course the One File PHP Photo Gallery script! Pointing your browser at the script will execute it and there will a short delay (or a longer delay depending on how many photo's you have) prior to a summary of the the thumbnails that have been created!

There is no actual output during the running of the script, only upon completion.

Again you are warned that I am no PHP expert and there may be a lot better ways of doing this, and possibly more secure too?

The Code

<!DOCTYPE html>
<html>
 <head>
  <title>Create Thumbs</title>
 </head>
<body>
<?php
// Give script enough time to run through many pics
set_time_limit(0);

// Change all filenames to lowercase
$directory=dirname(__FILE__);
$files = scandir($directory);
foreach($files as $key=>$name){
	$oldName = $name;
	$newName = strtolower($name);
	rename("$directory/$oldName","$directory/$newName");
        }

// Define directories
$imageDir = '';
$thumbsDir = 'thumbs/';
// Check if thumbnails are already created?
if (!is_dir($thumbsDir))
{ 
  @mkdir($thumbsDir);
  //  Create thumbs directory then read in images
   foreach(glob("$imageDir{*.jpg}", GLOB_BRACE) as $images) {
     $imageName = explode("/", $images);   
     $imageName = end($imageName);

     // Echo short message to user - only outputs at end?
      echo nl2br("Thumbnail created from image file: " .$imageName. "\n");

      // Load image and get image size
      $image = imagecreatefromjpeg( "{$imageDir}{$imageName}" );
      $width = imagesx( $image );
      $height = imagesy( $image );

      // Test for landscape or portrait image and set thumb width
      if ($width > $height) {
          $thumbWidth = 100;
          }
          else {
          $thumbWidth = 56;
      }    
      
      // Calculate size of thumbnail
      $new_width = $thumbWidth;
      $new_height = floor( $height * ( $thumbWidth / $width ) );

      // Create a new temporary image
      $tmp_img = imagecreatetruecolor( $new_width, $new_height );

      // copy and resize old image into new image 
      imagecopyresampled( $tmp_img, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height );

      // Append _th to image name to mark as thumbnail
      $imageName = substr_replace($imageName , '_th', -4, 0);
      
      // Write out thumbail to thumbs directory with quality 100
      imagejpeg( $tmp_img, "{$thumbsDir}{$imageName}", 100);
      }
}
 else {
      // Echo short message to user
      echo ("Thumbnails already created for this folder!");
      }
?>
</body>
</html>