Backend Quality Debugging

When to use this skill

• Troubleshooting bugs
• Production issues
• Performance problems
• Error tracking

Workflow

• ] Enable debug mode (dev only)
• ] Use logging
• ] Check query execution
• ] Use Kint for variables
• ] Track errors

Instructions

Logging

php
<?php

log_message('error', 'User not found: ' . $userId);
log_message('debug', 'Processing order: ' . $orderId);
log_message('info', 'Email sent to: ' . $email);

Debug Toolbar

php
<?php

// Config/Boot/development.php
Services::toolbar()->respond();

Variable Debugging

php
<?php

d($variable);    // Dump
dd($variable);   // Dump and die

Query Debugging

php
<?php

$db = \Config\Database::connect();
echo $db->getLastQuery();

Resources

• Log errors and important events
• Use debug toolbar in dev
• Never show errors in production