Laravel error Declaration of App\Exceptions\Handler::report(Throwable $exception)

Stefan Izdrail

Founder & Senior Architect · 2026-06-29

Laravel Company
Title: Understanding and Resolving "Declaration of App\Exceptions\Handler::report(Throwable $exception)" Error in Laravel 6 Introduction: When developing web applications using the popular Laravel framework, one may encounter certain errors that require our attention to ensure smooth app deployment. In this blog post, we'll discuss a common error related to report function calls and how it can be resolved. 1. The Error Message Details

Declaration of App\Exceptions\Handler::report(Throwable $exception) must be compatible with Illuminate\Foundation\Exceptions\Handler::report(Exception $e) in /home/kb2hm3y8r4wm/public_html/laravel.supremeanimation.com/app/Exceptions/Handler.php on line 8

The error message is pointing to a conflict of signatures within the report function calls. The Laravel framework uses two different report functions, one in 'App\Exceptions\Handler' and another in 'Illuminate\Foundation\Exceptions\Handler'. These exceptions are used for handling events during an application execution. 2. Understanding the Problem In Laravel 6, the 'report' function in the 'App\Exceptions\Handler' handles Throwable objects, which is a parent class of all error and exception classes. On the other hand, the function in 'Illuminate\Foundation\Exceptions\Handler' takes an Exception parameter for general exceptions. Since both classes inherit from the Exception class, it creates this confusion due to conflicting signatures. 3. Resolving the Error To fix the error, you can either modify the signature of the 'App\Exceptions\Handler::report()' function to accept a Throwable object like in the Illuminate namespace or implement the Illuminate's report function into your custom exception handler class. This approach ensures consistency and compatibility between both classes. Here is an example: ```php // In App\Exceptions\Handler.php namespace App\Exceptions; class Handler extends \Exception { public function report(Throwable $throwable) { // Handle the exception as required } } ``` Alternatively, you can update the 'App\Exceptions\Handler' class to accept an Exception object: ```php // In App\Exceptions\Handler.php namespace App\Exceptions; class Handler extends \Exception { public function report(Exception $exception) { // Handle the exception as required } } ``` 4. Best Practices for Handling Exceptions To avoid this and similar errors in future projects, it is essential to adhere to best practices when handling exceptions in Laravel 6 applications: - Ensure a consistent naming convention across all relevant classes. This will help maintain the proper hierarchy and ensure compatibility between different handlers and exception classes. - Stick to the default Laravel framework's built-in classes when possible, as they are thoroughly tested and optimized for performance. They should be your first choice unless you have specific reasons to extend them. - Keep the codebase organized by separating custom exception handler logic from system-level exception handling. This approach helps maintain clarity and scalability in large projects. - Test the application thoroughly, both locally and on a production environment. Identify any potential issues before deploying to avoid problems during deployment. Conclusion: By understanding the conflict behind this error message and implementing one of the resolution strategies discussed, you can ensure your Laravel 6 applications run smoothly without such errors. Ensure consistency in naming conventions and class hierarchies, adhere to best practices when handling exceptions, and test thoroughly for optimal performance and ease of maintenance. Happy coding!