Laravel:区别 App::bind 和 App::singleton

A very simple proof is to test out the behavior. Since the Laravel Application simply extends IlluminateContainerContainer, we'll use just the container (in my case I even only added the container as a dependency to my composer.json) to test.

require __DIR__ . '/vendor/autoload.php';

class FirstClass
{
    public $value;
}

class SecondClass
{
    public $value;
}

// Test bind()
$container = new IlluminateContainerContainer();

$container->bind('FirstClass');

$instance = $container->make('FirstClass');
$instance->value = 'test';

$instance2 = $container->make('FirstClass');
$instance2->value = 'test2';

echo "Bind: $instance->value vs. $instance2->value
";

// Test singleton()
$container->singleton('SecondClass');

$instance = $container->make('SecondClass');
$instance->value = 'test';

$instance2 = $container->make('SecondClass');
$instance2->value = 'test2'; // <--- also changes $instance->value

echo "Singleton: $instance->value vs. $instance2->value
";

结果如预期:

绑定:test 与 test2

单例:test2 与 test2

可能是一个肮脏的证明，但确实是一个.