Câu hỏi phỏng vấn Laravel
Câu hỏi

What are artisan commands?

Câu trả lời

Artisan commands are a set of command-line interface (CLI) tools provided by the Laravel framework to assist developers in building and managing their applications. These commands are powered by the Symfony Console component and are designed to automate and streamline various development tasks.

Key Features of Artisan Commands

  1. Listing Available Commands:

    • To view all available Artisan commands, you can use the list command:
      bash Copy
      php artisan list
    • Each command includes a help screen that describes its arguments and options, accessible via the help command:
      bash Copy
      php artisan help migrate
  2. Creating Custom Commands:

    • Developers can create their own custom commands using the make:command or make:console command:
      bash Copy
      php artisan make:command SendEmails
    • Custom commands are typically stored in the app/Console/Commands directory, but they can be stored elsewhere as long as they are autoloaded by Composer.
  3. Command Structure:

    • A custom command class includes properties like signature and description and a handle method where the command logic is placed.
    • Example of a custom command class:
      php Copy
      namespace App\Console\Commands;
      
      use Illuminate\Console\Command;
      
      class SendEmails extends Command
      {
          protected $signature = 'email:send {user} {--queue=default}';
          protected $description = 'Send emails to users';
      
          public function handle()
          {
              // Command logic here
          }
      }
  4. Registering Commands:

    • Custom commands need to be registered in the app/Console/Kernel.php file:
      php Copy
      protected $commands = [
          Commands\SendEmails::class,
      ];
  5. Executing Commands Programmatically:

    • Artisan commands can be executed from routes, controllers, or other commands using the Artisan facade:
      php Copy
      use Illuminate\Support\Facades\Artisan;
      
      Route::get('/foo', function () {
          $exitCode = Artisan::call('email:send', [
              'user' => 1,
              '--queue' => 'default'
          ]);
      });
  6. Queueing Commands:

    • Commands can be queued to run in the background using the queue method:
      ph... Copy
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