Code Explainers

Php code explainers

php 
<?php
 
namespace App\Http;
 

HTTP content negotiation in PHP

http content-negotiation parsing
Intermediate 9 steps
php 
<?php
 
namespace App\Listeners;
 

Generating responsive images in a Laravel listener

queued jobs event listeners image processing
Intermediate 7 steps
php 
final class InvoiceCalculator
{
    private const SCALE = 4;
 

Precise money math with PHP's BCMath

bcmath arbitrary precision money
Intermediate 8 steps
php 
<?php
 
namespace App\Jobs;
 

Debouncing a Laravel shipping-rate job

queues debouncing atomic-locks
Advanced 9 steps
php 
<?php
 
namespace App\Models\Concerns;
 

Building soft deletes as an Eloquent trait in Laravel

traits soft-delete global-scope
Intermediate 10 steps
php 
<?php
 
namespace App\Services;
 

Idempotent role assignment in Laravel

many-to-many pivot-data idempotency
Intermediate 8 steps
php 
<?php
 
namespace App\Services;
 

Merging overlapping busy time blocks in PHP

interval-merging sorting datetime
Intermediate 8 steps
php 
<?php
 
namespace App\Listeners;
 

How event subscribers group listeners in Laravel

event-driven subscribers queues
Intermediate 6 steps
php 
<?php
 
namespace App\Services;
 

How user impersonation works in Laravel

authentication authorization session
Intermediate 8 steps
php 
class OrderReceiptController extends Controller
{
    public function store(Request $request, Order $order)
    {

Handling receipt uploads in a Laravel controller

file-upload validation authorization
Intermediate 5 steps
php 
<?php
 
final class RememberMeCookie
{

Signed remember-me cookies in PHP

authentication hmac cookies
Intermediate 8 steps
php 
<?php
 
namespace App\Http\Middleware;
 

Caching HTTP responses with Laravel middleware

middleware caching http
Intermediate 8 steps
php 
<?php
 
namespace App\Validation;
 

Building a reusable address form validator in PHP

validation error-accumulation regex
Intermediate 9 steps
php 
<?php
 
namespace App\Http\Controllers;
 

A cached autocomplete endpoint in Laravel

caching validation query-ranking
Intermediate 8 steps
php 
<?php
 
declare(strict_types=1);
 

Normalizing human names in PHP

unicode text-normalization transliteration
Intermediate 8 steps
php 
<?php
 
namespace App\Http\Controllers;
 

Handling Stripe webhooks in Laravel

webhooks signature-verification dependency-injection
Intermediate 7 steps
php 
<?php
 
namespace App\FeatureFlags;
 

How a feature flag evaluator decides

feature-flags rollout hashing
Intermediate 8 steps
php 
namespace App\Providers;
 
use Illuminate\Support\Facades\Blade;
use Illuminate\Support\ServiceProvider;

Building a @money Blade directive in Laravel

blade-directive service-provider localization
Intermediate 5 steps