PHP Error Handler

If your Slim Framework application throws a PHP Runtime error (PHP 7+ only), the application invokes its PHP Error handler and returns a HTTP/1.1 500 Internal Server Error response to the HTTP client.

Default PHP Error handler

Each Slim Framework application has a default PHP Error handler. This handler sets the Response status to 500, it sets the content type to text/html, and it writes a simple explanation to the Response body.

Custom PHP Error handler

A Slim Framework application’s PHP Error handler is a Pimple service. You can substitute your own PHP Error handler by defining a custom Pimple factory method with the application container.

// Create Slim
$app = new \Slim\App();
// get the app's di-container
$c = $app->getContainer();
$c['phpErrorHandler'] = function ($c) {
    return function ($request, $response, $error) use ($c) {
        return $response->withStatus(500)
            ->withHeader('Content-Type', 'text/html')
            ->write('Something went wrong!');

N.B Check out Not Found docs for pre-slim creation method using a new instance of \Slim\Container

In this example, we define a new phpErrorHandler factory that returns a callable. The returned callable accepts three arguments:

  1. A \Psr\Http\Message\ServerRequestInterface instance
  2. A \Psr\Http\Message\ResponseInterface instance
  3. A \Throwable instance

The callable MUST return a new \Psr\Http\Message\ResponseInterface instance as is appropriate for the given error.