How does the PHP version impact the handling of arrays in form submissions?

When handling form submissions in PHP, the PHP version can impact how arrays are processed. In older PHP versions (5.x), arrays in form submissions are accessed using the `$_POST` or `$_GET` superglobals directly. However, in newer PHP versions (7.x), arrays in form submissions are accessed using the `$_POST['input_name']` syntax, where 'input_name' is the name attribute of the form input.

// Using $_POST superglobal directly in older PHP versions (5.x)
$value = $_POST['input_name'];

// Using $_POST['input_name'] syntax in newer PHP versions (7.x)
$value = $_POST['input_name'];