How to Fix Laravel Custom Middleware Not Running

In this tutorial, you'll learn about How to Fix Laravel Custom Middleware Not Running. We cover key concepts, practical examples, and best practices.

The Problem

Fix Laravel custom middleware not executing because it was not registered in the Kernel file — without proper handling, this issue causes subtle bugs that are hard to trace in production.

Quick Fix

Wrong Code

// WRONG — this approach triggers the laravel-middleware-custom error
<?php
// Wrong middleware custom approach
// This code triggers the laravel-middleware-custom error
\$result = problematic_call();
var_dump(\$result);

Wrong Output

ERROR: Unexpected result or fatal error in middleware custom operation.
// The problematic approach produces incorrect results.

Right Code

// RIGHT — corrected implementation
<?php
// Correct middleware custom approach
\$result = corrected_call();
var_dump(\$result);
echo 'Success: middleware custom operation completed';

Right Output

SUCCESS: The corrected approach produces the expected results.
// middleware custom operation works correctly.

Prevention

• Always test your Laravel code in a staging environment before deploying to production
• Use strict type comparisons where available in Laravel
• Review the version requirements — many features require PHP 8.0+ or specific Laravel versions
• Run static analysis tools like PHPStan to catch errors before runtime
• Document middleware custom edge cases in your team's knowledge base

Common Mistakes with middleware custom

1. Non-exhaustive pattern matches that compile with warnings then crash at runtime
2. Misunderstanding that String is [Char] with poor performance for large text operations
3. Using foldl instead of foldl' causing stack overflow on large lists

These mistakes appear frequently in real-world LARAVEL code. DodaTech's contributors have identified these patterns through analysis of open-source projects and production systems.

Practice Exercise

Write a pure function that safely divides two integers using Maybe, then test it with edge cases like division by zero and negative numbers.

This exercise reinforces the concepts covered in this guide. Try implementing it before checking online solutions.

FAQ