Code Explainers

Php code explainers

php 
namespace App\Providers;
 
use Illuminate\Database\Eloquent\Model;
use Illuminate\Support\Facades\Log;

Catching N+1 queries with Eloquent strict mode in Laravel

n+1 queries strict mode eager loading
Intermediate 7 steps
php 
<?php
 
namespace App\Support;
 

Recursively finding files with SPL iterators in PHP

recursion iterators filesystem
Intermediate 7 steps
php 
<?php
 
namespace App\Http\Requests;
 

A validated date-range value object in PHP

value-object validation immutability
Intermediate 7 steps
php 
<?php
 
namespace App\Http\Controllers\Api;
 

Building a cursor-paginated feed in Laravel

cursor-pagination eager-loading validation
Intermediate 8 steps
php 
<?php
 
namespace App\Services;
 

Caching per-tenant settings in Laravel

caching multi-tenancy dependency-injection
Intermediate 7 steps
php 
<?php
 
namespace App\Http\Middleware;
 

Idempotency keys in Laravel middleware

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

How a database backup command works in Laravel

artisan-command shell-process error-handling
Intermediate 8 steps
php 
function fuzzySearch(string $query, array $items, int $limit = 10): array
{
    $query = mb_strtolower(trim($query));
 

Building a ranked fuzzy search in PHP

fuzzy-search string-matching ranking
Intermediate 7 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 
<?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