[RESOLVED] workaround 0 equating to false

sareejoh

Sorry if this is wordy, but I want to make sure I'm not leaving anything out...

I'm working on modifying a page that stores info about which photo to display in several arrays (photo filename, thumbnail filename, title, description etc). I wanted to change it so that someone could bookmark a specific spot in the arrays, for example by using photos.php?photo=12.

If someone goes to photos.php?photo=12, it shows only that photo, but if the user goes to photos.php it falls through to displaying thumbnails of all the images.

The issue I'm running into is if the link is photos.php?photo=0 and then I use my if statement to check if($_GET['photo']), it obviously evaluates to false, and falls through to the thumbnails.

Anyone have some advice on a better way to do this (preferably without having to change the existing arrays)?

Thanks!

laserlight

Compare for equivalence instead of mere equality by using operator === or operator !==, e.g.,

if ($_GET['photo'] !== false)

NogDog

Just FYI, the PHP manual refers to them as the "identical" and "not identical" operators ("===" and "!==") as opposed to the "equal" and "not equal" operators ("==" and "!="), with "identical" meaning "equal and of the same type".

laserlight

NogDog wrote:
PHP manual refers to them as the "identical" and "not identical" operators

That is weird, I remember it differently.

sareejoh

Thanks! I looked up identical operators in my manual...I had breezed over that section, assuming I knew the operators since I knew other programming languages. Oops.

sareejoh

That didn't work either...but I found something that did work.

if(isset($_GET['photo']))