You are designing a webpage with PHP scripting language. Within your PHP script, you can access each form field (HTML form field) as a PHP variable whose name relates to the name of the form field.

Match the style of access (short, medium, and long style) with its characteristics.

-A.B.C.D.	Short style ($tireqty)
-A.B.C.D.	Medium style ($_POST['tireqty'])
-A.B.C.D.	Long style ($HTTP_POST_VARS['tireqty'])
-A.B.C.D.	Gangnam style ($PSY['tireqty'])

A.	Convenient but requires the register_globals configuration setting be turned on. Whether it is on or off by default depends on the version of PHP. In all versions since 4.2.0, it has been off by default. (This feature has been DEPRECATED as of PHP 5.3.0 and REMOVED as of PHP 5.4.0.)
B.	Now the recommended approach. It is fairly convenient but came into existence only with PHP 4.1.0
C.	The most verbose. Note, however, that it is deprecated and is therefore likely to be removed in the long term.
D.	This feature never existed.