Data backup and recovery using PHP and SQLite

Using PHP and SQLite for data backup and recovery

[Introduction]
In daily application development, data backup and recovery is a very important task. We need to ensure data security and retain historical data for query and recovery. This article will introduce how to use PHP and SQLite for data backup and recovery, and provide corresponding code examples.

[Background]
SQLite is a lightweight embedded database engine and is the first choice for many small applications. It is simple to use and does not require a separate server process, but directly accesses data stored in a single file. As a commonly used server-side scripting language, PHP combined with SQLite can provide us with flexible and efficient data backup and recovery functions.

【Data Backup】
Data backup is the process of copying data to other locations or storage media to prevent data loss or damage. The following is an example of data backup using PHP and SQLite:

<?php
// 配置SQLite数据库连接
$db = new PDO('sqlite:/path/to/database.db');

// 备份数据库
$backupPath = '/path/to/backup.sqlite';
copy('/path/to/database.db', $backupPath);

// 打开备份的数据库
$backupDb = new PDO('sqlite:' . $backupPath);
$backupDb->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

// 导出原数据库的数据到备份数据库
$query = $db->query('SELECT * FROM table_name');
$data = $query->fetchAll(PDO::FETCH_ASSOC);
foreach ($data as $row) {
    $columns = implode(',', array_keys($row));
    $values = implode(',', array_map(function($value) use ($backupDb) {
        return $backupDb->quote($value);
    }, $row));
    $backupDb->exec("INSERT INTO table_name ($columns) VALUES ($values)");
}

// 关闭数据库连接
$db = null;
$backupDb = null;

echo '数据备份成功！';
?>

[Data Recovery]
Data recovery is the process of importing backed up data into the database in order to restore it to a specified state. The following is an example of using PHP and SQLite for data recovery:

<?php
// 配置数据库连接
$db = new PDO('sqlite:/path/to/database.db');
$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

// 清空原数据库中的数据
$db->exec('DELETE FROM table_name');

// 打开备份的数据库
$backupDb = new PDO('sqlite:/path/to/backup.sqlite');
$backupDb->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

// 导入备份数据库的数据到原数据库
$query = $backupDb->query('SELECT * FROM table_name');
$data = $query->fetchAll(PDO::FETCH_ASSOC);
foreach ($data as $row) {
    $columns = implode(',', array_keys($row));
    $values = implode(',', array_map(function($value) use ($db) {
        return $db->quote($value);
    }, $row));
    $db->exec("INSERT INTO table_name ($columns) VALUES ($values)");
}

// 关闭数据库连接
$db = null;
$backupDb = null;

echo '数据恢复成功！';
?>

[Summary]
Using PHP and SQLite for data backup and recovery can help us ensure the security of the data and retain historical data for query and recovery. This article introduces how to use PHP and SQLite for data backup and recovery, and provides corresponding code examples. By using these methods flexibly, we can better manage and maintain data.

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