#Session
Simple strict typed session class which supports read only (read_and_close) and lazy loading. This package also provides a useful PSR-7 compatible middleware, e.g. for the Slim Framework 3.x, for starting a session.
###Installation
composer require acfo/session###Usage
Add the session class an middleware to your dependency injection container (e.g. Pimple):
$container[\Acfo\Session\Session::class] = function () {
return new \Acfo\Session\SessionImpl();
};
$container[\Acfo\Session\Middleware\Slim3\SessionMiddleware] = function ($container) {
return new \Acfo\Session\Middleware\Slim3\SessionMiddleware(
$container->get(\Acfo\Session\Session::class)
);
};Add middleware (e.g. Slim 3.x):
$app->add(\Acfo\Session\Middleware\Slim3\SessionMiddleware::class);This setup will allow read and write operations and not start the session before it is actually used, e.g.:
$session = $container->get(\Acfo\Session\Session::class);
$value = $session->get('key'); // lazy load: first access will invoke start_session
$session->set('key', 1234);
$session->regenerate();
$session->delete('key');
$session->deleteAll();
$session->close(); // call close if you want to end a read/write session as soon as possible.
###Advanced usage
The session class supports starting the session with the read_and_close flag introduced with PHP 7.0. This feature can help keep the time a session is locked for a specific user to the necessary minimum. This is especially useful for asynchronous web applications which generally do not write data in a GET-Request.
To specify which requests only need read access to the session data, pass a list of objects implementing the ReadOnlySessionStrategy interface as a parameter of the the middleware constructor, e.g.:
class GetRequestReadOnlySessionStrategy implements ReadOnlySessionStrategy
{
public function isReadOnly(ServerRequestInterface $request): bool
{
return $request->getMethod() == 'GET';
}
}
$container[\Acfo\Session\Middleware\Slim3\SessionMiddleware] = function ($container) {
$readOnlySessionStrategies = [
new GetRequestReadOnlySessionStrategy()
];
return new \Acfo\Session\Middleware\Slim3\SessionMiddleware(
$container->get(\Acfo\Session\Session::class),
$readOnlySessionStrategies
);
};
$app->add(\Acfo\Session\Middleware\Slim3\SessionMiddleware::class);The default settings for sessions are suitable for most applications. Should you need to adjust a setting, the most efficient way would be to edit the php.ini file. If you cannot or do not want to edit the php.ini file you can pass a list of settings to the SessionMiddleware.
$settings = \Acfo\Session\Middleware\Slim3\SessionMiddleware::RECOMMENDED_SETTINGS;
$container[\Acfo\Session\Middleware\Slim3\SessionMiddleware] = function ($container) {
$settings = \Acfo\Session\Middleware\Slim3\SessionMiddleware::RECOMMENDED_SETTINGS;
return new \Acfo\Session\Middleware\Slim3\SessionMiddleware(
$container->get(\Acfo\Session\Session::class),
null,
$settings
);
};
$app->add(\Acfo\Session\Middleware\Slim3\SessionMiddleware::class);Enjoy!
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