In php , why it is used "new" when reporting an exception since we do not need a variable cause action is already being concluded. This is a code i found when learning exception handling. I am having trouble understanding this.

<?php
function inverse($x) {
    if (!$x) {
        throw new Exception('Division by zero.');
    }
    return 1/$x;
}

try {
    echo inverse(5) . "\n";
    echo inverse(0) . "\n";
} catch (Exception $e) {
    echo 'Caught exception: ',  $e->getMessage(), "\n";
}

// Continue execution
echo "Hello World\n";
?>

Can't we use

throw Exception('Division by zero.');