How to develop a WordPress plugin that automatically backs up your database

How to develop a WordPress plug-in that automatically backs up the database

1. Introduction
With the rapid development of the Internet, databases have become an important component of many websites and applications. part. In order to ensure data security, database backup has become a necessary task. As one of the most popular content management systems currently, WordPress has an increasing demand for automatic database backup. This article will introduce how to develop a WordPress plug-in that automatically backs up the database and provide code examples.

2. Functional requirements

1. Regular automatic backup: The plug-in needs to be able to automatically back up the database at set intervals.
2. Scheduled task management: The plug-in needs to be able to easily manage scheduled tasks for database backup, including setting the backup time interval, enabling/disabling scheduled tasks, etc.
3. Backup file management: The plug-in needs to provide backup file management functions, including viewing, downloading, deleting backup files, etc.

3. Plug-in structure
This plug-in is based on the WordPress plug-in development framework and mainly consists of the following files:

1. backup-db.php: main plug-in File, used to register plug-in menus, add settings pages, etc.
2. backup-db-admin.php: Settings page file, used to manage the database backup settings of the plug-in.
3. backup-db-cron.php: scheduled task file, used to perform database backup.
4. backup-db-functions.php: Auxiliary function file, used to implement specific functions of database backup.

4. Plug-in development

1. Create the main plug-in file backup-db.php, add the plug-in menu and settings page:

   <?php
   /*
   Plugin Name: 自动备份数据库插件
   */
   
   add_action('admin_menu', 'backup_db_menu');
   function backup_db_menu() {
    add_menu_page('数据库备份', '数据库备份', 'manage_options', 'backup-db', 'backup_db_settings_page');
   }
   
   function backup_db_settings_page() {
    // 渲染设置页面的HTML代码
    include_once 'backup-db-admin.php';
   }
   ?>

2. Create the setting page file backup-db-admin.php to implement the scheduled task management function:

   <?php
   // 处理POST请求，保存设置
   if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    update_option('backup_db_enabled', isset($_POST['backup_db_enabled']));
    update_option('backup_db_interval', ($_POST['backup_db_interval'] ?? 1));
   }
   
   $backup_db_enabled = get_option('backup_db_enabled');
   $backup_db_interval = get_option('backup_db_interval');
   ?>
   
   <h1>数据库备份设置</h1>
   <form method="post">
    <label>
        <input type="checkbox" name="backup_db_enabled" <?php if ($backup_db_enabled) echo 'checked'; ?>>
        启用自动备份
    </label>
    <br>
    <label>
        备份时间间隔：
        <select name="backup_db_interval">
            <?php for ($i = 1; $i <= 24; $i++) {
                echo '<option value="' . $i . '" ' . ($backup_db_interval == $i ? 'selected' : '') . '>' . $i . '小时</option>';
            }?>
        </select>
    </label>
    <br>
    <input type="submit" value="保存设置">
   </form>

3. Create the scheduled task file backup-db-cron.php to implement the database Backup function:

   <?php
   require_once '../../../../wp-config.php';
   require_once 'backup-db-functions.php';
   
   if (get_option('backup_db_enabled')) {
    add_action('backup_database', 'backup_db');
    wp_schedule_event(time(), 'hourly', 'backup_database');
   }

4. Create the auxiliary function file backup-db-functions.php to realize the specific function of database backup:

   <?php
   function backup_db() {
    global $wpdb;
   
    $filename = 'backup-' . date('YmdHis') . '.sql';
    $filepath = WP_CONTENT_DIR . '/db-backup/' . $filename;
   
    exec('mysqldump -u ' . DB_USER . ' -p' . DB_PASSWORD . ' -h ' . DB_HOST . ' ' . DB_NAME . ' > ' . $filepath);
   
    // 简化代码，这里省略了备份文件的数据记录和管理
   
    echo '备份成功，请在' . $filepath . '查看备份文件。';
   }
   ?>

5. Installation and use

1. Name the plugin folder backup-db and upload the folder to the wp-content/plugins directory of WordPress .
2. Log in to the WordPress backend, enter the plug-in management page, and enable the "Automatic backup database plug-in".
3. Enter the settings page, set the automatic backup time interval, and save the settings.
4. After completing the above steps, the plug-in will automatically back up the database within the set time interval and display the path of the backup file after the backup is completed.

6. Summary
By developing a WordPress plug-in that automatically backs up the database, we have implemented the function of regularly backing up the database and provided a convenient management interface. By reading this article and referring to the code examples provided, you can quickly develop an automatic backup database plug-in that meets your needs, and simply manage database backups through the WordPress backend. This is very important to keep website data safe and prevent accidental data loss. Hope this article helps you!

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