Code Explainers

Php code explainers

php 
<?php
 
declare(strict_types=1);
 

A single-action JSON user controller in PHP

invokable-class json-api validation
Intermediate 7 steps
php 
<?php
 
namespace App\Services\Provisioning;
 

Sequencing site setup with Laravel job chains

job chains queues async workflows
Intermediate 6 steps
php 
final class UserActivityStream
{
    public function __construct(
        private readonly \PDO $db,

Streaming user activity with PHP generators

generators pagination lazy-evaluation
Intermediate 8 steps
php 
<?php
 
namespace App\Casts;
 

How a custom Eloquent cast wraps an Address in Laravel

value-objects serialization data-mapping
Intermediate 7 steps
php 
use Illuminate\Support\Facades\Route;
use App\Http\Controllers\Admin\DashboardController;
use App\Http\Controllers\Admin\UserController;
use App\Http\Controllers\Admin\ReportController;

How nested route groups compose in Laravel

routing middleware authorization
Intermediate 8 steps
php 
final class TokenBucketLimiter
{
    private float $tokens;
    private float $lastRefill;

How a token bucket rate limiter works

rate-limiting token-bucket throttling
Intermediate 7 steps
php 
<?php
 
namespace App\Events;
 

How a broadcast event works in Laravel

broadcasting websockets events
Intermediate 5 steps
php 
<?php
 
final class UserRepository
{

A safe PDO user repository in PHP

prepared-statements repository-pattern sql-injection
Intermediate 7 steps
php 
<?php
 
namespace App\Services;
 

Caching tenant dashboard metrics in Laravel

caching multi-tenancy aggregation
Intermediate 7 steps
php 
<?php
 
namespace App\Http\Controllers\Auth;
 

Rate-limited login in Laravel

authentication rate-limiting validation
Intermediate 9 steps
php 
<?php
 
namespace App\Http\Controllers;
 

Streaming a large CSV export in Laravel

streaming csv-export memory-efficiency
Intermediate 9 steps
php 
public function importUsers(array $users): int
{
    $inserted = 0;
 

Bulk-inserting users with batched PDO upserts

batching bulk-insert prepared-statements
Intermediate 6 steps
php 
<?php
 
namespace App\Events;
 

A priority event dispatcher in PHP

observer-pattern callbacks priority-ordering
Intermediate 8 steps
php 
<?php
 
namespace App\Http\Controllers;
 

Verifying Stripe webhooks in Laravel

webhooks signature-verification event-dispatch
Intermediate 8 steps
php 
<?php
 
namespace App\Http\Controllers;
 

Building a filtered product index in Laravel

query-builder validation conditional-queries
Intermediate 9 steps
php 
<?php
 
namespace App\Models\Scopes;
 

How a tenant global scope works in Laravel

multi-tenancy global-scope query-builder
Intermediate 5 steps
php 
<?php
 
namespace App\Support;
 

Retry with exponential backoff in PHP

retry exponential-backoff error-handling
Intermediate 7 steps
php 
<?php
 
declare(strict_types=1);
 

Validating registration input with filter_var

validation sanitization filter_var
Intermediate 8 steps