Some time ago, on your youtube site there was an auto image gallery tutorial. I decided to give it a try. My first attempt was on windows. Since then i have migrated to Linux and have found that this script does not work. So, i started from the beginning and this is where i am up to
<?php
        if (isset($_GET['img'])){
           if (file_exists($_GET['img'])){
		 ignore_user_abort(true);
                set_time_limit(120);
                ini_set('memory_limit', '512M');
                  
               $src_size = getimagesize($_GET['img']);
                   
              if ($src_size === false){
                 die('Not an Image.');
 		}
              $thumb_width   = 250;
              $thumb_height  = 200;
    
              print_r($src_size);
           }
         die();
}
 if (is_dir('./thumbs') === false){
            mkdir('./thumbs', 0744);
    }
   
    $images = glob('*.{jpg,jpeg,png,gif}', GLOB_BRACE);
     
    ?>
     
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <style type="text/css">
            a, img {float:left;}
            </style>
    </head>
     
    <body>
    <div> 
    <?php
     
    foreach($images as $image){
            if (file_exists("./thumbs/{$image}")){
                    echo "<a href=\"\"><img src=\"thumbs/{$image}\" alt=\"{$image}\" /></a>";
            }else{
                    echo "<a href=\"\"><img src=\"?img={$image}\" alt=\"{$image}\" /></a>";
            }
         }
      ?>
    </div>
   <body>
 </html>
According to the vid the output of the  print_r($src_size); returns an array of the image, well that does not happen, i just get a blankpage. Having noticed that the "?img=" does not appear in the url i added it, eg ?img=picture.jpg but still nothing displays.
I can not see anything that is wrong with my code, hopefully another set of eyes will help
Thanks in advance for you help