[RESOLVED] Can someone explain this line of code..please

[php_beginner_83]

Hi All

I was wondering if someone could explain a line of code to me...

<a href=\"".$_SERVER['PHP_SELF']."?p=".$photos[$key+1].$query."\">Next Photo &gt;</a>";

I dont understand the '?p=' part. What is it the 'p' is referencing? I've looked at the rest of the code to see if there's another element called 'p' but can't find anything.
I would appreciate the help.

Thanks much!

[bradgrafelman]

That just builds a query string, so the resulting URL would look like:

/myscript.php?p=32&foo=bar

When you click that link, the script would presumably use the data in the query string (e.g. from the $_GET array) to determine which photo to retrieve from the database (or wherever).