When sorting an array of objects in PHP, what is the significance of using usort versus uasort?

When sorting an array of objects in PHP, the significance of using usort versus uasort lies in the way the sorting algorithm is applied. usort is used when you want to sort the array based on the values of the objects, while uasort is used when you want to sort the array based on the keys of the objects.

// Using usort to sort objects based on values
usort($objects, function($a, $b) {
    return $a->value - $b->value;
});

// Using uasort to sort objects based on keys
uasort($objects, function($a, $b) {
    return strcmp($a->key, $b->key);
});