How to Create Custom CLI Commands Using the Symfony Console Component

This article will explore how to use the Symfony Console component to create custom command line interface (CLI) commands in a PHP application. After installing the necessary libraries, we will create some examples to demonstrate the concept of the Console component.

In fact, many PHP frameworks use this component to develop CLI applications, and some popular frameworks have taken it as a starting point.

What is a Console component?

The Symfony Console component allows you to create custom CLI commands in a PHP application. If you have ever used Laravel or Symfony, you may have learned about them in order to simplify daily operations (for example:

• Generate scaffolding code
• Clear cache
• Installing, enabling and disabling additional services
• Run database migration
• Wait

CLI tools provided.

For example, in Laravel, the execute method must return an integer that will be used as the command exit status. Therefore, we pass the Command::FAILURE and SymfonyComponentConsoleHelperProgressBar classes to implement the progress bar.

Next, we initialize the progress bar using the following statement:

<code>$progressBar = new ProgressBar($output, count($groups));<br></code>

In the first parameter you need to pass the start method. To advance the progress bar, you need to use the finish method to complete the progress bar. So whenever the command completes successfully, you can call this method so that the progress bar is refreshed with 100% completion.

In our example, we used the clear-cache command, as shown in the following code snippet, which should show the progress bar:

<code>$bin/console clear-cache --groups=group1,group2,group3,group4,group5<br> 5/5 [============================] 100%<br></code>

Since we pass five groups in the --groups option, the progress bar is initialized to five units. According to our logic, the progress bar should increase by 20% every five seconds and reach 100% after 25 seconds.

This is how to implement a progress bar in your command.

Summary

Today, we introduce one of the popular components provided by the Symfony framework: the Console component. It is indeed a very useful component if you want to develop your own CLI application to perform daily utility tasks easily.

In the first half, we introduce the installation and configuration of components. Then, in the second half, we create several examples of console commands.

The above is the detailed content of How to Create Custom CLI Commands Using the Symfony Console Component. For more information, please follow other related articles on the PHP Chinese website!