Slim Framework Flash Messages

This repository contains a Slim Framework Flash messages service provider. This enables you to define transient messages that persist only from the current request to the next request.

Install

Via Composer

$ composer require slim/flash

Requires Slim 3.0.0 or newer.

Usage

Slim 4

This example assumes that you have

php-di/php-di

require_once DIR . '/../vendor/autoload.php';

$containerBuilder = new ContainerBuilder();
// Add container definition for the flash component
$containerBuilder->addDefinitions(
    [
        'flash' => function () {
            $storage = [];
            return new Messages($storage);
        }
    ]
);
AppFactory::setContainer($containerBuilder->build());
$app = AppFactory::create();
// Add session start middleware
$app->add(
    function ($request, $next) {
        // Start PHP session
        if (session_status() !== PHP_SESSION_ACTIVE) {
            session_start();
        }
    // Change flash message storage
    $this->get('flash')->__construct($_SESSION);

    return $next->handle($request);
}
);
$app->addErrorMiddleware(true, true, true);
// Add routes
$app->get(
    '/',
    function ($request, $response) {
        // Set flash message for next request
        $this->get('flash')->addMessage('Test', 'This is a message');
    // Redirect
    $url = RouteContext::fromRequest($request)->getRouteParser()->urlFor('bar');

    return $response->withStatus(302)->withHeader('Location', $url);
}
);
$app->get(
    '/bar',
    function ($request, $response) {
        $flash = $this->get('flash');
    // Get flash messages from previous request
    $messages = $flash->getMessages();
    print_r($messages);

    // Get the first message from a specific key
    $test = $flash->getFirstMessage('Test');
    print_r($test);

    return $response;
}
)->setName('bar');
$app->run();

Slim 3

// Start PHP session
session_start();

$app = new \Slim\App();
// Fetch DI Container
$container = $app->getContainer();
// Register provider
$container['flash'] = function () {
    return new \Slim\Flash\Messages();
};
$app->get('/foo', function ($req, $res, $args) {
    // Set flash message for next request
    $this->flash->addMessage('Test', 'This is a message');
// Redirect
return $res->withStatus(302)->withHeader('Location', '/bar');
});
$app->get('/bar', function ($req, $res, $args) {
    // Get flash messages from previous request
    $messages = $this->flash->getMessages();
    print_r($messages);
// Get the first message from a specific key
$test = $this->flash->getFirstMessage('Test');
print_r($test);
});
$app->run();

Please note that a message could be a string, object or array. Please check what your storage can handle.

Using with Twig-View

If you use Twig-View, then slim-twig-flash may be a useful integration package.

Testing

$ phpunit

Contributing

Please see CONTRIBUTING for details.

Security

If you discover any security related issues, please email [email protected] instead of using the issue tracker.

Credits

• Josh Lockhart
• All Contributors

License

The MIT License (MIT). Please see License File for more information.