How to deploy PHP applications using Deployer

How to use Deployer to deploy PHP applications

In the modern software development process, automated deployment is becoming more and more important. Deployer is a simple and powerful PHP deployment tool, which can help us deploy PHP applications easily. This article will introduce how to use Deployer to deploy PHP applications and provide some code examples.

1. Install Deployer

First, we need to install Deployer through Composer. Run the following command in the command line:

composer require deployer/deployer --dev

After the installation is complete, we can see a file named deploy.php in the project root directory.

2. Configure deployment server information

In the deploy.php file, we can configure the connection information of the remote server. The specific configuration is as follows:

// 远程服务器连接信息
set('default_stage', 'production');
set('deploy_path', '/path/to/your/deployment/directory');

// 服务器连接
host('your-server.com')
    ->user('username')
    ->stage('production')
    ->set('deploy_path', '/path/to/your/deployment/directory');

3. Define deployment tasks

In the deploy.php file, we can define specific deployment tasks. The following is an example:

// 创建一个任务
task('deploy', function () {
    invoke('deploy:info');

    // 更新代码
    invoke('deploy:update_code');

    // 安装依赖
    invoke('deploy:shared');

    // 执行数据库迁移
    invoke('deploy:migrate');

    // 清除缓存
    invoke('deploy:cache');

    // 链接到当前版本
    invoke('deploy:symlink');

    // 清理老版本
    invoke('deploy:cleanup');

    // 成功消息
    invoke('deploy:success');
});

4. Run the deployment task

After we have completed the definition of the deployment task, we can deploy our application by running the following command:

dep deploy

During the deployment process, Deployer will connect to the remote server according to the configuration and perform the deployment tasks we defined.

5. Other common tasks

In addition to the above basic deployment tasks, Deployer also provides some other commonly used tasks. Here are some examples:

// 重启服务器
task('restart', function () {
    run('sudo service php7.4-fpm restart');
});

// 链接到最新版本
task('deploy:symlink', function () {
    run("cd {{deploy_path}} && ln -nfs releases/{{release_name}} current");
});

// 清理老版本
task('deploy:cleanup', function () {
    run("cd {{deploy_path}} && ls -dt releases/* | tail -n +4 | xargs rm -rf");
});

These example tasks can be customized and extended to suit your needs.

6. Summary

Using Deployer can make the deployment process of PHP applications simpler and more reliable. We can easily deploy our application by configuring server information, defining deployment tasks, and running deployment commands. Code examples using Deployer can help us better understand and use this powerful deployment tool. Hope this article is helpful to everyone!

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