Incrementing values

[Yokiest]

I'm new to php and i just know the basics right now and what i'm trying to do is create a gallery which I've done successfully the only problem is that there are only 15 images and you will have the ability to comment on them but the comment program i have post to the page and i dont have 16 images is there a way i can make it go from 15 back to 1

also the pages are set up like this

index.php?images=1

i need the image variable to go from 15 back to 1

[kaafmim]

put this right after were you add to image number(replace image_num with the name of your variable for image numbers):

if ($image_num==16) $image_num=1;

[Sodbuster]

Just for safety's sake, use ">", rather than "==". For instance, if you test for equality to 16 and some joker requests "index.php?image=17" you'd be in trouble. In other words, don't test for a single number, test to see if the image number is out of the proper range; if it is, reset.

PHP Code:

$image_count = 15;
$image_num = (integer) $_GET['images'];
if (($image_num > $image_count) || ($image_num < 1)) {
    $image_num = 1;
}