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165 lines
3.9 KiB
Markdown
165 lines
3.9 KiB
Markdown
# Command
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The default command component of Hyperf provided by [hyperf/command](https://github.com/hyperf-cloud/command) component,And this component is a abstraction of [symfony/console](https://github.com/symfony/console).
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# Installation
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This component usually exists by default, but if you want to use it for non-Hyperf projects, you can also rely on the [hyperf/command](https://github.com/hyperf-cloud/command) component with the following command:
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```bash
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composer require hyperf/command
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```
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# Command List
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Run `php bin/hyperf.php` without any arguments directly is to display the command list.
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# Custom Command
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## Generate a Command
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If you have the [hyperf/devtool](https://github.com/hyperf-cloud/devtool) component installed, you can generate a custom command with the `gen:command` command:
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```bash
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php bin/hyperf.php gen:command FooCommand
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```
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After executing the above command, a configured `FooCommand` class will be generated in the `app/Command` folder.
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### Definition of Command
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There are two forms of commands that define the command class. One is defined by the `$name` property, and the other is defined by the constructor argument. We demonstrate this through code examples, assuming we want to define the command. The class command is `foo:hello`:
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#### Define the command by `$name` property:
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```php
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<?php
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declare(strict_types=1);
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namespace App\Command;
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use Hyperf\Command\Command as HyperfCommand;
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use Hyperf\Command\Annotation\Command;
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/**
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* @Command
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*/
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class FooCommand extends HyperfCommand
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{
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/**
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* The command
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*
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* @var string
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*/
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protected $name = 'foo:hello';
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}
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```
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#### Define the command by constructor:
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```php
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<?php
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declare(strict_types=1);
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namespace App\Command;
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use Hyperf\Command\Command as HyperfCommand;
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use Hyperf\Command\Annotation\Command;
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/**
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* @Command
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*/
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class FooCommand extends HyperfCommand
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{
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public function __construct()
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{
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parent::__construct('foo:hello');
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}
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}
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```
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### Define the logic of the command
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The logic that the command class actually runs depends on the `handle` method inside the code, which means that the `handle` method is the entry point to the command.
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```php
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<?php
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declare(strict_types=1);
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namespace App\Command;
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use Hyperf\Command\Command as HyperfCommand;
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use Hyperf\Command\Annotation\Command;
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/**
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* @Command
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*/
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class FooCommand extends HyperfCommand
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{
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/**
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* The command
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*
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* @var string
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*/
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protected $name = 'foo:hello';
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public function handle()
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{
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// Output Hello Hyperf. in the Console via the built-in method line()
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$this->line('Hello Hyperf.', 'info');
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}
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}
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```
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### Define the arguments of the command
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When writing a command, the user's input is usually collected by `parameter` and `option`, and the `parameter` or `option` must be defined before collecting a user input.
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#### Parameter
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Suppose we want to define a `name` parameter, and then pass the arbitrary string such as `Hyperf` to the command and execute `php bin/hyperf.php foo:hello Hyperf` to output `Hello Hyperf`. Let's demonstrate it by code:
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```php
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<?php
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declare(strict_types=1);
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namespace App\Command;
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use Hyperf\Command\Annotation\Command;
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use Hyperf\Command\Command as HyperfCommand;
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use Symfony\Component\Console\Input\InputArgument;
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/**
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* @Command
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*/
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class FooCommand extends HyperfCommand
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{
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/**
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* The command
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*
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* @var string
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*/
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protected $name = 'foo:hello';
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public function handle()
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{
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// Get the name argument from $input
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$argument = $this->input->getArgument('name') ?? 'World';
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$this->line('Hello ' . $argument, 'info');
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}
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protected function getArguments()
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{
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return [
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['name', InputArgument::OPTIONAL, 'Here is an explanation of this parameter']
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];
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}
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}
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```
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Execute `php bin/hyperf.php foo:hello Hyperf` command and we can see `Hello Hyperf` display on Console.
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