(adsbygoogle = window.adsbygoogle || []).push({}); For the next couple of days I plan on posting a few PHP tutorials.

A variable starts with a "$" and the name you use, variables are case sensitive. A valid variable name starts with a letter or underscore, followed by any number of letters, numbers, or underscores, I.E:

    

$variable

$-variable

$_variable

$34525

"$this" can't be used as it a default php variable.

You can do "plus, minus, divide, times, etc" with PHP like so:

    

$ex = '5';

$ex2 = '5';



echo $ex + $ex2; //This would output 10

Or you could just do:

    

$ex = '5+5';



echo $ex; //Would output 10

That's just some of the things you can do with variables, but this tutorial is over, thanks for reading! :p