How can performance be improved in PHP by utilizing superglobal arrays like $_GET instead of long predefined variables?

Using superglobal arrays like $_GET instead of long predefined variables can improve performance in PHP by reducing the amount of memory used to store variables and simplifying the code structure. By directly accessing values from superglobal arrays, we can avoid declaring and initializing multiple variables, which can lead to faster execution times.

// Using $_GET superglobal array to improve performance
$id = $_GET['id'];
$name = $_GET['name'];

// Instead of declaring variables like this:
// $id = $_POST['id'];
// $name = $_POST['name'];