PHP: re-declaring $_GET and $_POST in script

[opinuejen]

In risk of sparking an opinionated discussion I ask the following:Is it considered bad practice to re-declare \[code\]$_POST\[/code\] and \[code\]$_GET\[/code\] variables inside a PHP script?I.e.\[code\]$_POST['var'] = 'someValue';$_GET['var'] = '';\[/code\]The reason is emptying variables on certain instances and thus avoiding reloading page and risk of sending headers multiple times.