PHP Simple Image Gallery

It is a very easy to create a simple image gallery using PHP script. What I mean is that I'm using a PHP function glob. This function will output the name of files in the folder. If this function can display the name of the files, then of course it should be able to display the files especially image files. I used the HTML tag <img src="" /> to display the image file and thus I created a very simple image gallery. The following is the PHP code: