Code Explainers

Php code explainers

php 
<?php
 
namespace App\Support;
 

Locale-aware formatting with PHP's intl extension

internationalization encapsulation constructor-injection
Intermediate 7 steps
php 
<?php
 
namespace App\Support;
 

Merging query params onto a URL in PHP

url-parsing query-strings immutability
Intermediate 8 steps
php 
<?php
 
class ImageUploadService
{

Validating file uploads safely in PHP

file-upload input-validation security
Intermediate 8 steps
php 
<?php
 
namespace App\View;
 

Building a safe HTML escaper in PHP

security xss escaping
Intermediate 6 steps
php 
<?php
 
namespace App\Observers;
 

How Eloquent observers hook lifecycle events in Laravel

observers lifecycle-hooks queues
Intermediate 6 steps
php 
<?php
 
namespace App\Rules;
 

How a custom phone validation rule works in Laravel

validation custom-rules dependency
Intermediate 6 steps
php 
<?php
 
namespace App\Support;
 

Building a URL slug from any title in PHP

regex transliteration string-processing
Intermediate 8 steps
php 
<?php
 
declare(strict_types=1);
 

Streaming file lines with a PHP generator

generators lazy-evaluation file-io
Intermediate 7 steps
php 
<?php
 
namespace App\Providers;
 

Binding a payment gateway in Laravel

dependency-injection service-container interface-binding
Intermediate 7 steps
php 
<?php
 
namespace App\Http\Controllers\Auth;
 

How a Laravel registration endpoint works

validation database-transactions events
Intermediate 8 steps
php 
<?php
 
namespace App\Http\Controllers;
 

Handling avatar uploads in Laravel

file-upload image-processing validation
Intermediate 8 steps
php 
<?php
 
namespace App\Security;
 

Secure password hashing with Argon2id in PHP

password-hashing argon2id timing-attacks
Intermediate 8 steps
php 
<?php
 
namespace App\Security;
 

A fixed-window rate limiter on APCu

rate-limiting fixed-window caching
Intermediate 8 steps
php 
class PostController extends Controller
{
    public function index(Request $request)
    {

Eager loading without N+1 in Laravel

eager-loading n+1 query-builder
Intermediate 9 steps
php 
class PostController extends Controller
{
    public function index(Request $request): AnonymousResourceCollection
    {

Filtered, paginated JSON APIs in Laravel

eloquent query-builder api-resources
Intermediate 8 steps
php 
<?php
 
namespace App\Support;
 

Grouping records with array_reduce in PHP

array-reduce grouping higher-order-functions
Intermediate 6 steps
php 
<?php
 
namespace App\Console;
 

How task scheduling works in Laravel

scheduling cron fluent-api
Intermediate 7 steps
php 
<?php
 
namespace App\Policies;
 

How authorization policies gate updates in Laravel

authorization policies access control
Intermediate 7 steps