Code Explainers

Laravel code explainers

php 
<?php
 
namespace App\Console\Commands;
 

How a database backup command works in Laravel

artisan-command shell-process error-handling
Intermediate 8 steps
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 
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 
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\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\View\Composers;
 

How a Laravel view composer feeds the navigation

view-composer caching dependency-injection
Intermediate 5 steps
php 
<?php
 
namespace App\Services;
 

Managing many-to-many tags in Laravel

many-to-many pivot-table collections
Intermediate 9 steps
php 
<?php
 
namespace App\Services;
 

Optimistic locking on invoices in Laravel

optimistic-locking transactions concurrency
Advanced 6 steps
php 
<?php
 
namespace App\Providers;
 

Defining rate limiters in Laravel

rate limiting service provider closures
Intermediate 7 steps
php 
<?php
 
namespace App\Http\Middleware;
 

ETag caching and gzip in Laravel middleware

middleware http-caching etag
Intermediate 8 steps
php 
<?php
 
namespace App\Http\Resources;
 

Shaping API JSON with a Laravel Resource

api serialization data transformation
Intermediate 7 steps
php 
<?php
 
namespace App\Jobs;
 

Building a unique queued job in Laravel

queues background-jobs idempotency
Intermediate 7 steps