What is the significance of using the Closure instance in route callbacks in Slim?

Using a Closure instance in route callbacks in Slim allows for encapsulating the route logic within a function that can access variables from the parent scope. This is useful for passing additional data or dependencies to the route handler without cluttering the global namespace. It also helps in maintaining a clean and modular code structure. 

use Slim\Factory\AppFactory;

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

$app = AppFactory::create();

$dependency = 'some_dependency';

$app->get('/route', function ($request, $response, $args) use ($dependency) {
    // Route logic using $dependency
    return $response;
});

$app->run();

Keywords

Closure instance route callbacks Slim framework PHP significance

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