Pages IDs or "?" pages

[Anon]

Sorry...

I am a beginner
I want to start using PHP.

Can you explain pages ID creation?
For example

"http://www.phpbuilder.com/forum/list.php3?num=2" WHAT IS THIS?

What is blabla?id=2 or blabla?num=2 vs vs vs...

I am in hire :🙂)

[Anon]

:-))) It is not ID at all...
When you write "list.php3?num=2" it just means that when you open list.php3, it will have $num variable initialised with value "2".

[Anon]

Those are variables passed through the URL.
It keep data across multiple pages.

if you have blahblah?id=2

on that page you can assess the id with $HTTP_GET_VARS['id']

[Anon]

Thanks but its nut helpfulll for stupid newbies 🙂

[Anon]

Ask question one more time because questions are not clear for stupid "not-newbies" :-)
I will try once more. Imagine you must open detail page for some product. The form is always the same, but information is different. Let's say, your detail page is "detail.php3". How do you know for which produkt you must show info? By this product's ID. How do you transfer this ID to "detail.php3"? Easy: you write in the URL where you open it:

echo'<a href="detail.php3?id=1">Detail page for product 1</a>';

So, when details.php3 opens, it knows that its inner variable $id=1.
If you have in detail.php3 code like this:

echo 'Product ID value is: '.$id;

it will print you:
Product ID value is: 1

[Anon]

WOW
Thank you for details. You are really perfect.
😉