Laravel Best Practices for Sharing Data Between Views and Controllers

     let age = 25;
     age = 26; // Allowed
     console.log(age); // 26

• Used for variables whose value should not change.
• Example:

Use React.memo to prevent unnecessary re-renders in connected components:

import React from 'react';

const UserItem = React.memo(({ user }) => {
  return <li>{user.name}</li>;
});

Always use Laravel’s query builder or Eloquent to avoid directly injecting user input into SQL queries:

Vulnerable Code:

Laravel's default pagination system is robust for standard web applications, but API responses often require custom structures to meet front-end requirements or adhere to RESTful standards. This tutorial demonstrates how to build a tailored pagination system for API responses, including metadata, links, and cursor-based pagination.

Imagine you’re building an API where:

   $orders = Order::with(['customer', 'products'])->get();

Processing large datasets can cause memory issues if all records are loaded at once.

Middleware executes in the order defined in Kernel.php. Conflicts can occur if one middleware depends on another but runs earlier.

Solution: Define Middleware Priority

• Configurations like the app’s name, timezone, or default pagination limit are stored in the database.
• Localization adapts dynamically to user preferences or admin-defined site-wide language settings.

We’ll set up a system to:

• Global Limits: Values such as maximum uploads or API rate limits.
• User Permissions: Whether a user has specific privileges like admin access.
• Feature Toggles: Configuration to enable or disable specific features dynamically.

Centralizing the loading of this data reduces redundant queries and ensures consistent access across the application.

   namespace App\Http\Controllers;

   class FileController extends BaseController
   {
       public function upload()
       {
           if (!$this->canUploadFiles()) {
               return redirect()->back()->with('error', 'File uploads are disabled.');
           }

           // Handle file upload logic here
       }
   }

• Centralized Logic: Common functionality is defined in one place, reducing code duplication.
• Ease of Maintenance: Updates to shared logic automatically apply to all child controllers.
• Improved Readability: Child controllers remain focused on specific actions, while shared concerns are handled in the Base Controller.

   <p>API Limit: {{ $globalPreferences['api_limit'] }}</p>

   @if ($globalPreferences['app_mode'] === 'maintenance')
       <p>The application is currently under maintenance.</p>
   @else
       <p>The application is live.</p>
   @endif

   @if ($globalPreferences['feedback_form_enabled'])
       <form>
           <!-- Feedback form content -->
           <button type="submit">Submit Feedback</button>
       </form>
   @endif

To access shared data in controllers, you can retrieve it directly using the View facade.

• Performance Improvement: Avoid redundant database queries by loading shared data once.
• Centralized Data Logic: Keep shared data in a single location for easy maintenance.
• Reusability: Access the same data instance anywhere in the application without reloading.

By using the singleton pattern in Laravel, you’ve optimized how shared data is managed and accessed across your application. This approach ensures efficient performance and consistent data usage, making it ideal for managing application-wide settings, preferences, or resource limits.

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Enable logging of malicious or suspicious requests, including the IP address and user agent, for forensic analysis.

log_format suspicious '$remote_addr - $remote_user [$time_local] "$request" ';
error_log /var/log/nginx/error.log;

Keyboard shortcuts can help reduce the time it takes to perform common actions, such as navigating through code, opening files, or running tests. By minimizing the need to switch between the keyboard and mouse, shortcuts help maintain focus and improve coding speed.

Why Customize?

   sudo systemctl start fail2ban
   sudo systemctl enable fail2ban

An Intrusion Detection System (IDS) monitors your server for signs of malicious activity. Tools like AIDE (Advanced Intrusion Detection Environment) can help detect unauthorized changes to your system.

  php artisan route:clear

• Cache Views

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