湖南日报：贫困群众满意是脱贫攻坚的最高标准
Choose a feature flag strategy such as config-based, database-driven, or third-party tools like Flagsmith. 2. Set up a database-driven system by creating a migration for a feature_flags table with name, enabled, and rules fields, then run the migration. 3. Create a FeatureFlag model with fillable attributes and casts for enabled and rules. 4. Build a FeatureFlagService to centralize logic, including an isEnabled method that checks flag status and evaluates rules like rollout percentage or allowed user IDs. 5. Use the service in controllers, Blade templates, and middleware to conditionally display features or restrict access. 6. Manage flags via Artisan commands or an admin panel, and implement caching using Laravel’s cache system to improve performance by storing flag states for a set duration, clearing cache when flags are updated. This approach ensures flexible, safe, and scalable feature rollouts in Laravel applications.
Implementing feature flags in a Laravel app is a practical way to control feature rollouts, enable A/B testing, or safely deploy code without exposing it to all users immediately. Here’s how to do it effectively.
1. Choose a Feature Flag Strategy
Before writing code, decide how you want to manage your flags:
- Simple config-based flags – Good for basic on/off switches.
- Database-driven flags – Better for dynamic control without redeploying.
- Third-party tools – Like LaunchDarkly, Flagsmith, or Unleash – ideal for complex targeting, user segmentation, and analytics.
For most Laravel apps, a database-driven approach with a simple service wrapper gives a good balance of flexibility and control.
2. Set Up a Database-Driven Feature Flag System
Step 1: Create a Migration
php artisan make:migration create_feature_flags_table
Schema::create('feature_flags', function (Blueprint $table) {
$table->id();
$table->string('name')->unique(); // e.g., 'new_dashboard'
$table->boolean('enabled')->default(false);
$table->json('rules')->nullable(); // For user-based, percentage rollouts, etc.
$table->timestamps();
});Run the migration:
php artisan migrate
Step 2: Create a FeatureFlag Model
php artisan make:model FeatureFlag
// app/Models/FeatureFlag.php
namespace App\Models;
use Illuminate\Database\Eloquent\Model;
class FeatureFlag extends Model
{
protected $fillable = ['name', 'enabled', 'rules'];
protected $casts = [
'enabled' => 'boolean',
'rules' => 'array',
];
}3. Create a Feature Service
This centralizes flag logic.
php artisan make:service FeatureFlagService
Note: Laravel doesn’t have
make:serviceby default. You can create the directory and class manually.
// app/Services/FeatureFlagService.php
namespace App\Services;
use App\Models\FeatureFlag;
use Illuminate\Support\Facades\Auth;
class FeatureFlagService
{
public function isEnabled(string $flagName, $user = null): bool
{
$flag = FeatureFlag::where('name', $flagName)->first();
if (!$flag || !$flag->enabled) {
return false;
}
// Optional: Handle rules (e.g., percentage rollout, specific users)
if ($flag->rules) {
return $this->evaluateRules($flag->rules, $user ?: Auth::user());
}
return true;
}
private function evaluateRules(array $rules, $user = null): bool
{
// Example: Rollout to 10% of users
if (isset($rules['rollout_percentage'])) {
$percentage = $rules['rollout_percentage'];
$userId = $user ? $user->id : rand(1, 1000);
return (crc32((string) $userId) % 100) < $percentage;
}
// Example: Allow specific user IDs
if (isset($rules['allowed_user_ids']) && $user) {
return in_array($user->id, $rules['allowed_user_ids']);
}
return true;
}
}Register it in a service provider or resolve it via Laravel’s container.
4. Use Feature Flags in Your App
In Controllers
use App\Services\FeatureFlagService;
public function showDashboard(FeatureFlagService $features)
{
if ($features->isEnabled('new_dashboard')) {
return view('dashboard.new');
}
return view('dashboard.old');
}In Blade Templates
@if(app(App\Services\FeatureFlagService::class)->isEnabled('new_ui'))
<x-new-layout />
@else
<x-old-layout />
@endifIn Middleware (Optional)
Create middleware to restrict routes:
php artisan make:middleware CheckFeatureFlag
public function handle($request, Closure $next, $flag)
{
if (!app(FeatureFlagService::class)->isEnabled($flag)) {
abort(403, 'Feature not available.');
}
return $next($request);
}Register in Kernel.php and use:
Route::get('/beta', function () {
// ...
})->middleware('feature:beta_access');5. Manage Flags via Artisan or Admin Panel
Artisan Command (Optional)
php artisan make:command ToggleFeature
// In handle()
$flag = FeatureFlag::firstOrCreate(['name' => $this->argument('name')]);
$flag->enabled = $this->argument('state') === 'on';
$flag->save();Usage:
php artisan feature:toggle new_dashboard on
6. Consider Caching for Performance
Since flags are checked frequently, cache them:
public function isEnabled(string $flagName, $user = null): bool
{
$flag = cache()->remember('feature_flag:'.$flagName, 3600, function () use ($flagName) {
return FeatureFlag::where('name', $flagName)->first();
});
// ... rest of logic
}Remember to clear cache when updating flags.
Bonus: Use a Package (Optional)
Instead of building from scratch, consider:
- rt2800/laravel-feature-flags – Simple DB-backed flag package.
- Flagsmith Laravel SDK – Full-featured remote flag management.
These handle syncing, targeting, and UI.
Basically, you’ve got options — from simple config flags to full dynamic systems. Start small, use a service class, store flags in the DB, and scale as needed. The key is making flags easy to toggle and safe to leave in code.
The above is the detailed content of How to implement feature flags in a Laravel app?. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undress AI Tool
Undress images for free
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
How to set environment variables in PHP environment Description of adding PHP running environment variables
Jul 25, 2025 pm 08:33 PM
There are three main ways to set environment variables in PHP: 1. Global configuration through php.ini; 2. Passed through a web server (such as SetEnv of Apache or fastcgi_param of Nginx); 3. Use putenv() function in PHP scripts. Among them, php.ini is suitable for global and infrequently changing configurations, web server configuration is suitable for scenarios that need to be isolated, and putenv() is suitable for temporary variables. Persistence policies include configuration files (such as php.ini or web server configuration), .env files are loaded with dotenv library, and dynamic injection of variables in CI/CD processes. Security management sensitive information should be avoided hard-coded, and it is recommended to use.en
What is Configuration Caching in Laravel?
Jul 27, 2025 am 03:54 AM
Laravel's configuration cache improves performance by merging all configuration files into a single cache file. Enabling configuration cache in a production environment can reduce I/O operations and file parsing on each request, thereby speeding up configuration loading; 1. It should be enabled when the application is deployed, the configuration is stable and no frequent changes are required; 2. After enabling, modify the configuration, you need to re-run phpartisanconfig:cache to take effect; 3. Avoid using dynamic logic or closures that depend on runtime conditions in the configuration file; 4. When troubleshooting problems, you should first clear the cache, check the .env variables and re-cache.
How to develop AI intelligent form system with PHP PHP intelligent form design and analysis
Jul 25, 2025 pm 05:54 PM
When choosing a suitable PHP framework, you need to consider comprehensively according to project needs: Laravel is suitable for rapid development and provides EloquentORM and Blade template engines, which are convenient for database operation and dynamic form rendering; Symfony is more flexible and suitable for complex systems; CodeIgniter is lightweight and suitable for simple applications with high performance requirements. 2. To ensure the accuracy of AI models, we need to start with high-quality data training, reasonable selection of evaluation indicators (such as accuracy, recall, F1 value), regular performance evaluation and model tuning, and ensure code quality through unit testing and integration testing, while continuously monitoring the input data to prevent data drift. 3. Many measures are required to protect user privacy: encrypt and store sensitive data (such as AES
How to make PHP container support automatic construction? Continuously integrated CI configuration method of PHP environment
Jul 25, 2025 pm 08:54 PM
To enable PHP containers to support automatic construction, the core lies in configuring the continuous integration (CI) process. 1. Use Dockerfile to define the PHP environment, including basic image, extension installation, dependency management and permission settings; 2. Configure CI/CD tools such as GitLabCI, and define the build, test and deployment stages through the .gitlab-ci.yml file to achieve automatic construction, testing and deployment; 3. Integrate test frameworks such as PHPUnit to ensure that tests are automatically run after code changes; 4. Use automated deployment strategies such as Kubernetes to define deployment configuration through the deployment.yaml file; 5. Optimize Dockerfile and adopt multi-stage construction
Explain Laravel Eloquent Scopes.
Jul 26, 2025 am 07:22 AM
Laravel's EloquentScopes is a tool that encapsulates common query logic, divided into local scope and global scope. 1. The local scope is defined with a method starting with scope and needs to be called explicitly, such as Post::published(); 2. The global scope is automatically applied to all queries, often used for soft deletion or multi-tenant systems, and the Scope interface needs to be implemented and registered in the model; 3. The scope can be equipped with parameters, such as filtering articles by year or month, and corresponding parameters are passed in when calling; 4. Pay attention to naming specifications, chain calls, temporary disabling and combination expansion when using to improve code clarity and reusability.
PHP development user permission management monetization PHP permission control and role management
Jul 25, 2025 pm 06:51 PM
User permission management is the core mechanism for realizing product monetization in PHP development. It separates users, roles and permissions through a role-based access control (RBAC) model to achieve flexible permission allocation and management. The specific steps include: 1. Design three tables of users, roles, and permissions and two intermediate tables of user_roles and role_permissions; 2. Implement permission checking methods in the code such as $user->can('edit_post'); 3. Use cache to improve performance; 4. Use permission control to realize product function layering and differentiated services, thereby supporting membership system and pricing strategies; 5. Avoid the permission granularity is too coarse or too fine, and use "investment"
How to use PHP combined with AI to analyze video content PHP intelligent video tag generation
Jul 25, 2025 pm 06:15 PM
The core idea of PHP combining AI for video content analysis is to let PHP serve as the backend "glue", first upload video to cloud storage, and then call AI services (such as Google CloudVideoAI, etc.) for asynchronous analysis; 2. PHP parses the JSON results, extract people, objects, scenes, voice and other information to generate intelligent tags and store them in the database; 3. The advantage is to use PHP's mature web ecosystem to quickly integrate AI capabilities, which is suitable for projects with existing PHP systems to efficiently implement; 4. Common challenges include large file processing (directly transmitted to cloud storage with pre-signed URLs), asynchronous tasks (introducing message queues), cost control (on-demand analysis, budget monitoring) and result optimization (label standardization); 5. Smart tags significantly improve visual
How to build a content payment platform through PHP How to implement PHP paid reading system
Jul 25, 2025 pm 06:30 PM
To build a PHP content payment platform, it is necessary to build a user management, content management, payment and permission control system. First, establish a user authentication system and use JWT to achieve lightweight authentication; second, design the backend management interface and database fields to manage paid content; third, integrate Alipay or WeChat payment and ensure process security; fourth, control user access rights through session or cookies. Choosing the Laravel framework can improve development efficiency, use watermarks and user management to prevent content theft, optimize performance requires coordinated improvement of code, database, cache and server configuration, and clear policies must be formulated and malicious behaviors must be prevented.
