PHP Display Images from Directory

Here Is the how the display Images from the Folder (Directory).
1) The file contains making Thumbnail from the Images.  

<?php
/* function:  generates thumbnail */
function make_thumb($source,$destination,$desired_width) {
 /* read the source image */
 $source_image = imagecreatefromjpeg($source);
 $width = imagesx($source_image);
 $height = imagesy($source_image);
 /* Set the Height Width Of the thumbnail, relative to the desired width  */
 $desired_height = floor($height*($desired_width/$width));
 /* create a new, "virtual" image */
 $virtual_image = imagecreatetruecolor($desired_width,$desired_height);
 /* copy source image at a resized size */
 imagecopyresized($virtual_image,$source_image,0,0,0,0,$desired_width,$desired_height,$width,$height);
 /* create the physical thumbnail image to its destination */
 imagejpeg($virtual_image,$dest);
}
/* function:  returns files from dir */
function get_files($images_dir,$exts = array('jpg')) {
 $files = array();
 if($handle = opendir($images_dir)) {
  while(false !== ($file = readdir($handle))) {
   $extension = strtolower(get_file_extension($file));
   if($extension && in_array($extension,$exts)) {
    $files[] = $file;
   }
  }
  closedir($handle);
 }
 return $files;
}
/* function:  returns a file's extension */
function get_file_extension($file_name) {
 return substr(strrchr($file_name,'.'),1);
}
?>

2) Actual File which you have to run in your browser for result.

<?php
$images_dir = 'preload-images/';
$thumbs_dir = 'preload-images-thumbs/';
$thumbs_width = 200;
$images_per_row = 3;
/** generate photo gallery **/
$image_files = get_files($images_dir);
if(count($image_files)) {
$index = 0;
foreach($image_files as $index=>$file) {
$index++;
$thumbnail_image = $thumbs_dir.$file;
if(!file_exists($thumbnail_image)) {
$extension = get_file_extension($thumbnail_image);
if($extension) {
make_thumb($images_dir.$file,$thumbnail_image,$thumbs_width);
}
}
echo '<a href="',$images_dir.$file,'" >< img src="',$thumbnail_image,'" /></a>';
if($index % $images_per_row == 0) { echo '<div class="clear"></div>'; }
}
echo '<div class="clear"></div>';
}
else {
    echo '<p>There are no images in this gallery.</p>';
}
?>

You can enter your CSS classies and change the display style of the images.

PDF FIle creation in PHP

Here is the simple code from which you can create pdf page which containts the "Hello world" string written in it.