$_REQUEST — HTTP Request variables
|5.3.0||Introduced request_order. This directive affects the contents of $_REQUEST.|
|4.3.0||$_FILES information was removed from $_REQUEST.|
Note: This is a 'superglobal', or automatic global, variable. This simply means that it is available in all scopes throughout a script. There is no need to do global $variable; to access it within functions or methods.
Note: Variables provided to the script via the GET, POST, and COOKIE input mechanisms, and which therefore cannot be trusted. The presence and order of variable inclusion in this array is defined according to the PHP variables_order configuration directive.