Retrieving parameters is simple. For example, someone may access your website at http://your-website-here.net/index.php?A=B.
If you want to retrieve the value of A, you can either refer to the variable by name or get it using the $_GET array. The contents of $A and $_GET["A"] will be B. No other steps are needed to retrieve the variable.
To learn more about PHP, we suggest consulting the PHP Group website or other PHP resources.
