How to convert errors to exceptions

Silex will catch exceptions that are thrown from within a request/response cycle. It will however not catch PHP errors and notices. You can catch them by converting them to exceptions, this recipe will tell you how.

Why does Silex not do this?

Silex could do this automatically in theory, but there is a reason why it does not. Silex acts as a library, this means that it does not mess with any global state. Since error handlers are global in PHP, it is your responsibility as a user to register them.

Registering the ErrorHandler

Fortunately, Silex ships with an ErrorHandler (it’s part of the HttpKernel package) that solves this issue. It converts all errors to exceptions, and exceptions can be caught by Silex.

You register it by calling the static register method:

use Symfony\Component\HttpKernel\Debug\ErrorHandler;

ErrorHandler::register();

It is recommended that you do this in your front controller, i.e. web/index.php.

Note

The ErrorHandler has nothing to do with the ExceptionHandler. The ExceptionHandler is responsible for displaying caught exceptions nicely.