What does this code do?

[Snorkel]

Hello All,

This is my first post as I am new to PHP.  I am learning how to develop web apps for education using PHP, CSS and HTML.  I dont know any of those languages.  My question is

what does the following code do/mean?: 

$page = ($_GET['page'])

[justsomeguy]

It just sets a variable to another value.  That value comes from $_GET, which holds all of the values that were included in the URL.

[iwato]

$_GET is a called a superglobal in PHP.  It is a wrapper for one to many variables sent via an HTTP request.

HTTP REQUEST: http://www.grammarcaptive.com?hash=30a6836a3f7c5fc57751a61098e5c221&podcast_no=21

 

URL Without a Query String:   http://www.grammarcaptive.com

Query String:  ? +  hash=30a6836a3f7c5fc57751a61098e5c221 + & + podcast_no=21

 

The string literal  '30a6836a3f7c5fc57751a61098e5c221' becomes the value of $_GET['hash']

The number 21 becomes the value of $_GET['podcast_no']

[Snorkel]

Thank You All.