How can GET and POST methods be effectively used to change variable values in a PHP script?

To change variable values in a PHP script using GET and POST methods, you can pass the new values through the URL or in a form submission. For GET method, you can append the variable and its new value to the URL as query parameters. For POST method, you can include the variable and its new value in a form submission. In the PHP script, you can then retrieve the new value using $_GET or $_POST superglobals and update the variable accordingly.

// Using GET method to change variable value
$variable = $_GET['variable'];
$newValue = $_GET['new_value'];
$variable = $newValue;

// Using POST method to change variable value
$variable = $_POST['variable'];
$newValue = $_POST['new_value'];
$variable = $newValue;