Receiving a Request in PHP

The $_REQUEST command receives requests from the Internet. Requests are formatted as:
http://url?&var1=val1&var2=val2...
where url is the URL of your PHP code, var1, var2... are external variables and val1, val2... are the values of those variables.

If you say $x=$_REQUEST['var1']; this sets the variable $x to the value of the variable var1.

For more on $_REQUEST, see:

• W3Schools Explanation
• PHP Manual Entry on $_REQUEST