Location: PHPKode > scripts > Windows Image Gallery > windows_image_gallery/include/functions.php
<?php
function createThumbs( $pathToImages, $pathToThumbs, $thumbWidth ) 
{
  // open the directory
  $dir = opendir( $pathToImages );

  // loop through it, looking for any/all JPG files:
  while (false !== ($fname = readdir( $dir ))) {
    // parse path for the extension
    $info = pathinfo($pathToImages . $fname);
    // continue only if this is a JPEG image
    if ( strtolower($info['extension']) == 'jpg' ) 
    {

      //Check if the thumb already excisting
      if(!file_exists($pathToImages."thumbs/".$fname)) {

         // load image and get image size
         $img = imagecreatefromjpeg( "{$pathToImages}{$fname}" );
         $width = imagesx( $img );
         $height = imagesy( $img );

         // calculate thumbnail size
         $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 
         imagecopyresized( $tmp_img, $img, 0, 0, 0, 0, $new_width, $new_height, $width, $height );

         // save thumbnail into a file
         imagejpeg( $tmp_img, "{$pathToThumbs}{$fname}" );
       }
     }
   }
   // close the directory
   closedir( $dir );
}

// call createThumb function and pass to it as parameters the path 
// to the directory that contains images, the path to the directory
// in which thumbnails will be placed and the thumbnail's width. 
// We are assuming that the path will be a relative path working 
// both in the filesystem, and through the web for links
createThumbs($filePath, $filePaththumb, $thumb_width);
?>
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