looping through photos

[TheGringo]

I seem to be going in circles.

What I want to do is to have a user click on a link, and each time the link is clicked, a new photo is shown. I would name the photos sequentially, like "01.jpg, 02.jpg, 03.jpg", etc. The code I'm using to echo the images to the page is

<?php


if ($photo) {
$photo = $photo . ".jpg" ;
	if (file_exists($photo)){
	echo "<img src=\"" . $photo . "\" width=\"300\" height=\"400\">"; 
	} else {
		echo "<img src=\"default.jpg\" width=\"300\" height=\"400\">";
		}
}

?>

Does that sort of make sense? How can I get it to loop through the other photos, forward and backward?

[jpmoriarty]

dont reassign the $photo variable if you want to do that. and I'd use a get variable to store $photo in too.

do something like $photo_filename= $_GET['$photo'].".jpg";

and then later on you could do something like:

echo "<a href=\"display.php?".($_GET['photo']-1)."\">Previous photo</a>";

and

echo "<a href=\"display.php?".($_GET['photo']+1)."\">Next photo</a>";