Code Explainers

Php code explainers

php 
<?php
 
namespace App\Models;
 

Debouncing Eloquent jobs in Laravel

debounce model-events queued-jobs
Advanced 7 steps
php 
<?php
 
namespace App\Http\Controllers\Api;
 

Cursor pagination in a Laravel API

pagination cursor keyset
Intermediate 9 steps
php 
<?php
 
namespace App\Queue;
 

A stable priority job queue in PHP

priority-queue data-structures closures
Intermediate 8 steps
php 
<?php
 
namespace App\Support;
 

Normalizing phone numbers to E.164 in PHP

input-validation normalization regular-expressions
Intermediate 8 steps
php 
final class Route
{
    private string $regex;
    private array $paramNames = [];

Compiling route patterns into regex in PHP

routing regex parsing
Intermediate 8 steps
php 
public function customerTotals(Request $request): Collection
{
    return DB::table('orders')
        ->join('customers', 'customers.id', '=', 'orders.customer_id')

Building an aggregate report with Laravel's query builder

query builder aggregation conditional queries
Intermediate 8 steps
php 
<?php
 
namespace App\Services;
 

Tagged cache invalidation in Laravel

caching cache-tags invalidation
Intermediate 5 steps
php 
final class BitmapGrid
{
    private SplFixedArray $cells;
 

A flat-array bitmap grid in PHP

data-structures row-major-order bitmap
Intermediate 7 steps
php 
namespace App\Http\Filters;
 
use Closure;
use Illuminate\Database\Eloquent\Builder;

Composable query filters with Laravel's Pipeline

pipeline query-builder single-responsibility
Intermediate 7 steps
php 
namespace App\Providers;
 
use Illuminate\Database\Query\Builder as QueryBuilder;
use Illuminate\Database\Eloquent\Builder as EloquentBuilder;

Adding a whereActive macro in Laravel

macros service-provider query-builder
Intermediate 5 steps
php 
<?php
 
namespace App\Reminders;
 

Scheduling reminders across time zones in PHP

timezones datetime immutability
Intermediate 7 steps
php 
<?php
 
namespace App\Http\Middleware;
 

Verifying GitHub webhook signatures in Laravel

middleware hmac webhooks
Intermediate 5 steps
php 
<?php
 
namespace App\Models;
 

How Eloquent scopes model order status in Laravel

query scopes state machine eloquent
Intermediate 7 steps
php 
<?php
 
namespace App\Http\Controllers;
 

Streaming a filtered CSV export in Laravel

streaming csv-export query-builder
Intermediate 9 steps
php 
<?php
 
namespace App\Http\Middleware;
 

Idempotent requests with Laravel middleware

idempotency middleware caching
Advanced 8 steps
php 
<?php
 
namespace App\Services;
 

Batch image resizing with PHP GD

image-processing constructor-promotion match-expression
Intermediate 10 steps
php 
<?php
 
namespace App\Cache;
 

A content-hashed fragment cache in PHP

caching content-hashing atomic-writes
Intermediate 10 steps
php 
<?php
 
namespace App\View\Composers;
 

How a Laravel view composer feeds the navigation

view-composer caching dependency-injection
Intermediate 5 steps