Code Explainers

Php code explainers

php
<?php
 
namespace App\Console\Commands;
 

Releasing stale document locks in Laravel

artisan-command transactions row-locking
Intermediate 6 steps
php
<?php
 
namespace App\Providers;
 

Subdomain multi-tenancy routing in Laravel

multi-tenancy service-container route-binding
Advanced 7 steps
php
<?php
 
namespace App\Broadcasting;
 

Authorizing presence channels in Laravel

broadcasting authorization presence-channels
Intermediate 3 steps
php
<?php
 
namespace App\Http\Middleware;
 

Resolving the current team in Laravel middleware

middleware multi-tenancy cookies
Intermediate 8 steps
php
<?php
 
namespace App\Http\Controllers;
 

Broadcasting typing indicators in Laravel

websockets authorization presence-channels
Intermediate 9 steps
php
<?php
 
namespace App\Services\Reports;
 

Streaming a monthly revenue CSV in Laravel

csv-export lazy-collections eloquent-query
Intermediate 8 steps
php
<?php
 
namespace App\Services;
 

Computing rolling averages in Laravel

rolling-average date-ranges collections
Intermediate 8 steps
php
<?php
 
namespace App\Storage;
 

A race-free file counter in PHP

file-locking concurrency atomicity
Intermediate 7 steps
php
<?php
 
namespace App\Http\Support;
 

Adding RFC 5988 Link headers in Laravel

pagination http-headers rest-api
Intermediate 7 steps
php
<?php
 
declare(strict_types=1);
 

Streaming a fixed-width file into typed objects

generators value-objects file-parsing
Intermediate 8 steps
php
<?php
 
namespace App\Jobs;
 

A retrying queue job in Laravel

queues background-jobs retries
Intermediate 7 steps
php
final class Container
{
    private array $bindings = [];
    private array $instances = [];

Building a DI container with reflection in PHP

dependency-injection reflection autowiring
Advanced 9 steps
php
<?php
 
namespace App\Providers;
 

Defining feature flags with Laravel Pennant

feature-flags service-provider config-driven
Intermediate 6 steps
php
<?php
 
namespace App\Http\Controllers;
 

Email confirmation with signed URLs in Laravel

signed-urls email-verification middleware
Intermediate 6 steps
php
<?php
 
namespace App\RateLimiting;
 

Sliding-window rate limiting with Redis sorted sets

rate-limiting redis sorted-sets
Advanced 8 steps
php
<?php
 
namespace App\Models\Concerns;
 

How an Auditable trait logs Eloquent changes in Laravel

traits model-events polymorphic-relations
Intermediate 8 steps
php
<?php
 
namespace App\Http\Controllers;
 

Server-Sent Events in Laravel

server-sent-events streaming long-polling
Advanced 9 steps
php
<?php
 
namespace App\Actions\Imports;
 

Streaming CSV imports with Laravel batches

lazy-collections job-batching streaming
Advanced 9 steps