Use Deployer to implement on-demand publishing of PHP applications

Title: Use Deployer to implement on-demand release of PHP applications

Introduction: When developing PHP applications, we often need to deploy the application to the production environment. Deployer is a simple and easy-to-use deployment tool that helps us achieve on-demand release. This article will introduce how to use Deployer to implement on-demand publishing of PHP applications and provide relevant code examples.

1. What is Deployer?
Deployer is an open source deployment tool written in PHP. It uses the SSH protocol to connect to the server and deploy applications through a simple configuration file. Deployer supports a variety of server platforms, including Linux, Unix and Windows, and has integrated many commonly used application development frameworks, such as Laravel, Symfony, etc.

2. Install Deployer

1. Use Composer to install Deployer:

   composer require deployer/deployer --dev

2. Create a new deployment configuration file (deploy.php) , and add the following content to the file:

   <?php
   
   require 'recipe/common.php';
   
   // 服务器登录信息
   server('live', 'your_server_address', 22)
    ->user('your_username')
    ->identityFile('~/.ssh/id_rsa')
    ->stage('live')
    ->env('deploy_path', '/var/www/html');
   
   // 应用程序配置
   set('application', 'your_application_name');
   set('repository', 'git@github.com:your_username/your_repository.git');

3. Write deployment tasks
In Deployer, we can define the deployment process of the application by writing tasks. The following is a simple example that demonstrates how to deploy a Git-based PHP application:

<?php

desc('发布应用程序');
task('deploy', [
    'deploy:info',
    'deploy:prepare',
    'deploy:update_code',
    'deploy:shared',
    'deploy:writable',
    'deploy:symlink',
    'cleanup',
    'success'
]);

after('deploy', 'deploy:cleanup');

4. Perform deployment tasks

1. Execute the following command to deploy the application Deploy to server:

   dep deploy

2. Deployer will automatically perform deployment tasks and display detailed deployment logs.

5. Custom deployment tasks
Deployer provides many built-in tasks that can meet the needs of most application deployments. If you need to customize the task, you can write it as follows:

<?php

desc('自定义任务');
task('my_task', function () {
    // 执行自定义任务的代码
});

after('deploy', 'my_task');

6. Summary
This article introduces how to use Deployer to implement on-demand release of PHP applications. Deployer is a powerful and easy-to-use deployment tool that greatly simplifies the application deployment process. Using Deployer, we can easily deploy PHP applications and customize the deployment tasks according to our needs. I hope this article can help readers better understand and use Deployer.

Keywords: Deployer, deployment tool, PHP application, release on demand, code example

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