How to use monolog in slim 3? - monolog

Question

In my app.php file:
use Monolog\Logger;
use Monolog\Handler\StreamHandler;
class App extends \DI\Brifge\Slim\app
{
public function configureContainer(ContainerBuilder $builder)
{
$dependencies = [
'logger' => function (Container $container) {
$logger = new Monolog\Logger('logger');
$filename = _DIR__ . '/../log/error.log';
$stream = new Monolog\Handler\StreamHandler($filename, Monolog\Logger::DEBUG);
$fingersCrossed = new Monolog\Handler\FingersCrossedHandler(
$stream, Monolog\Logger::ERROR);
$logger->pushHandler($fingersCrossed);
return $logger;
},
];
}
}
In my custom error handler:
class CustomErrorHandler
{
protected $logger;
public function __construct(Logger $logger)
{
$this->logger = $logger;
}
public function __invoke(ServerRequestInterface $request, ResponseInterface $response, $exception)
{
$output = ['success'=>0, 'error'=>"Oops! Something's not right "];
$this->logger->critical($output);
return $response->withStatus(500)
->withHeader('Content-Type', 'application/json')
->write(json_encode($output));
}
}
When an error is thrown, following message is displayed:
Fatal error: Uncaught Error: Class 'App\Monolog\Logger' not found in C:\xampp\htdocs\backend\app\App.php:103 Stack trace: #0 [internal function]: App\App->App{closure}(Object(DI\Container)) #1 C:\xampp\htdocs\backend\vendor\php-di\invoker\src\Invoker.php(82): call_user_func_array(Object(Closure), Array) #2 C:\xampp\htdocs\backend\vendor\php-di\php-di\src\DI\Definition\Resolver\FactoryResolver.php(81): Invoker\Invoker->call(Object(Closure), Array) #3 C:\xampp\htdocs\backend\vendor\php-di\php-di\src\DI\Definition\Resolver\ResolverDispatcher.php(58): DI\Definition\Resolver\FactoryResolver->resolve(Object(DI\Definition\FactoryDefinition), Array) #4 C:\xampp\htdocs\backend\vendor\php-di\php-di\src\DI\Container.php(287): DI\Definition\Resolver\ResolverDispatcher->resolve(Object(DI\Definition\FactoryDefinition), Array) #5 C:\xampp\htdocs\backend\vendor\php-di\php-di\src\DI\Container.php(124): DI\Container->resolveDefinition(Object(DI\Definition\FactoryDefinition)) #6 C:\xampp\htdocs\backend\app\App.php(95): DI\Container->get('l in C:\xampp\htdocs\backend\app\App.php on line 103
I have included the statement use Monolog\Logger; in App.php file but I get the above error.

Answer 1

You forgot to register dependencies in configureContainer method:
use Monolog\Logger;
use Monolog\Handler\StreamHandler;
class App extends \DI\Bridge\Slim\App
{
public function configureContainer(ContainerBuilder $builder)
{
$dependencies = [
'logger' => function (Container $container) {
$logger = new Monolog\Logger('logger');
$filename = _DIR__ . '/../log/error.log';
$stream = new Monolog\Handler\StreamHandler($filename, Monolog\Logger::DEBUG);
$fingersCrossed = new Monolog\Handler\FingersCrossedHandler(
$stream, Monolog\Logger::ERROR);
$logger->pushHandler($fingersCrossed);
return $logger;
},
];
// Register definitions
$builder->addDefinitions($dependencies);
}
}
Also you have a mistake in App class declaration, it's \DI\Bridge\Slim\App, not \DI\Brifge\Slim\app

Answer 2

I understood where I was wrong.
No need to include the lines:
use Monolog\Logger;
use Monolog\Handler\StreamHandler;
While instantiating, I have included the complete path.