OOP Shopping Cart m_template.php line 39 - Why no period?

[Drew2 9]

Quick question:

Why are there no periods bordering this php insertion?

header("Location: $url");

I would expect it to look like this:

header("Location: . $url . ");

My guess, reading W3Schools and elsewhere is that both would amount to the same thing.  

I have to wonder though, it they amount to the same thing, why ever use the periods?  -Seems like more work.

[administrator 425]

In programming, some languages will just allow some flexibility. In some instances, using extra code is an option to make the code more ridged ... which can be good for maintainability reasons. 

[Drew2 9]

Got it, thanks