Laravel Middleware Quick Reference Cheat Sheet
Key Takeaways
- ✓Bookmark this Laravel Middleware reference for quick daily syntax lookups
- ✓Modern PHP syntax is concise with constructor promotion and match expressions
- ✓Always use strict types and prepared statements in every PHP file
- ✓PHP 8.x features like enums and readonly properties simplify common patterns
Laravel Middleware Essential Syntax
// Artisan commands
php artisan make:model User -mfc // Model + migration + factory + controller
php artisan make:middleware Auth
php artisan migrate:fresh --seed
php artisan route:list
php artisan tinker
// Eloquent basics
User::all();
User::find(1);
User::where('active', true)->get();
User::create(['name' => 'Alice']);
User::findOrFail(1)->update([...]);
User::destroy(1);Laravel Middleware Common Operations
// Arrays
$arr = [1, 2, 3];
array_push($arr, 4); // Append
array_merge($a, $b); // Merge
array_filter($arr, fn($v) => $v > 1);
array_map(fn($v) => $v * 2, $arr);
array_reduce($arr, fn($c, $v) => $c + $v, 0);
in_array($needle, $arr);
array_key_exists('k', $arr);
// String operations
str_contains($h, $n); str_starts_with($h, $p);
str_ends_with($h, $s); strtolower($s); strtoupper($s);
substr($s, 0, 5); explode(',', $s); implode(',', $a);Think Your Code Is Clean? Let NexusBro QA It in 20 Seconds.
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// Match expression (PHP 8.0+)
$result = match($status) {
'active' => 'User is active',
'inactive', 'banned' => 'User cannot login',
default => 'Unknown status',
};
// Null coalescing
$name = $input ?? 'default';
$name ??= 'default'; // Assignment
// Null-safe operator
$country = $user?->address?->country;
// Spread operator
function sum(int ...$nums): int {
return array_sum($nums);
}
$merged = [...$arr1, ...$arr2];Laravel Middleware OOP Quick Reference
// Constructor promotion (PHP 8.0+)
class User {
public function __construct(
public readonly int $id,
public string $name,
private string $email,
) {}
}
// Interface
interface Cacheable {
public function getCacheKey(): string;
public function getCacheTTL(): int;
}
// Enum (PHP 8.1+)
enum Role: string {
case Admin = 'admin';
case User = 'user';
public function isAdmin(): bool {
return $this === self::Admin;
}
}Laravel Middleware File and I/O Operations
// File operations
$content = file_get_contents('file.txt');
file_put_contents('out.txt', $data);
$lines = file('file.txt', FILE_IGNORE_NEW_LINES);
// JSON
$json = json_encode($data, JSON_THROW_ON_ERROR);
$data = json_decode($json, true, 512, JSON_THROW_ON_ERROR);
// CSV
$fp = fopen('data.csv', 'r');
while (($row = fgetcsv($fp)) !== false) {
process($row);
}
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See PlansFrequently Asked Questions
How do I use this Laravel Middleware cheat sheet effectively?
Bookmark this page and reference it when writing PHP code. Focus on the essential syntax section first. As you encounter specific patterns, check the relevant section. Over time, frequently-used syntax becomes muscle memory and you will only need the cheat sheet for less common operations.
Is this cheat sheet updated for PHP 8.x?
Yes, all code examples use modern PHP 8.x syntax including constructor promotion, match expressions, named arguments, enums, union types, and readonly properties. We update this cheat sheet with each new PHP release.
Can I use these Laravel Middleware snippets in production?
Yes, all snippets follow production best practices including strict types, proper error handling, and security considerations. However, always adapt them to your specific project requirements, add appropriate error handling for your context, and test thoroughly before deployment.
What PHP extensions do I need for these Laravel Middleware examples?
Most examples use core PHP functionality. Database examples require the PDO extension with your database driver (e.g., pdo_mysql). JSON functions are built into PHP 8.x. Check your php.ini or run php -m to see installed extensions.
Where can I practice these Laravel Middleware patterns?
Use php -a for an interactive REPL, create small scripts to test individual patterns, or set up a local development environment with Laravel Herd, DDEV, or Docker. Online tools like 3v4l.org let you test PHP snippets across multiple PHP versions in your browser.
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