الفرق بين bind و singleton في Service Container

<?php

use Illuminate\Container\Container;

$container = new Container();
$container->bind("example", fn () => new stdClass());
var_export($container->make("example") === $container->make("example"));

false

<?php

use Illuminate\Container\Container;

$container = new Container();
$container->singleton("example", fn () => new stdClass());
var_export($container->make("example") === $container->make("example"));

true