Request Handling with PHP Enums in Laravel

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Request Handling with PHP Enums in Laravel image

Laravel enhances its request handling capabilities with direct enum support, enabling type-safe processing of enumerated values from incoming requests. This feature simplifies input validation and ensures data consistency when working with predefined sets of values.

use App\Enums\UserRole;
// Basic enum retrieval
$role = $request->enum('role', UserRole::class);

Here's an example of building a subscription management system:

// app/Enums/SubscriptionTier.php
<?php
 
namespace App\Enums;
 
enum SubscriptionTier: string
{
case FREE = 'free';
case BASIC = 'basic';
case PRO = 'pro';
case ENTERPRISE = 'enterprise';
 
public function getMonthlyLimit(): int
{
return match($this) {
self::FREE => 1000,
self::BASIC => 5000,
self::PRO => 20000,
self::ENTERPRISE => 100000
};
}
}
 
// app/Controllers/AccountController.php
namespace App\Http\Controllers;
 
use App\Enums\SubscriptionTier;
use App\Models\Account;
use Illuminate\Http\Request;
 
class AccountController extends Controller
{
public function updateSubscription(Request $request, Account $account)
{
$newTier = $request->enum('tier', SubscriptionTier::class);
if (!$newTier) {
return response()->json([
'error' => 'Invalid subscription tier provided'
], 422);
}
$account->update([
'subscription_tier' => $newTier,
'monthly_limit' => $newTier->getMonthlyLimit(),
'upgraded_at' => now()
]);
 
return response()->json([
'message' => 'Subscription updated successfully',
'account' => $account->fresh()
]);
}
}

Example usage:

// Input request
{
"tier": "pro"
}
 
// Success response
{
"message": "Subscription updated successfully",
"account": {
"id": 1,
"subscription_tier": "pro",
"monthly_limit": 20000,
"upgraded_at": "2024-02-01T10:30:00.000000Z"
}
}
 
// Invalid input
{
"tier": "premium" // Non-existent enum value
}
 
// Error response
{
"error": "Invalid subscription tier provided"
}

Request enum handling provides a robust way to process enumerated values while maintaining type safety and domain integrity.

Harris Raftopoulos photo

Senior Software Engineer | 15+ years in PHP, 11+ with Laravel

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