GET and POST superglobal arrays

They are basically means to pass data from one page to another or within the page itself, for eg. from
an HTML form to a PHP script.
Basic syntax,
$_POST['key'];
$_GET['key'];

The GET method passes variables as a part of the URL. For example when a user is redirected from
a page http://www.google.ca during a search, you might have noticed a ? followed by some data.
These are the variables passed from the previous page.

This is how you use the get method

<a href="page2.php?var=$var&var2=$var2">Click</a>

These variables will now be stored in the GET superglobal array.
print_r($_GET) will return the array.

Now, in page2.php file, you can GET $var and $var2

$a=$_GET['var'];

Now a will contain the value of $var from page1.