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數(shù)據(jù)庫連接
$db = new PDO('sqlite:/path/to/database.db');

// 備份數(shù)據(jù)庫
$backupPath = '/path/to/backup.sqlite';
copy('/path/to/database.db', $backupPath);

// 打開備份的數(shù)據(jù)庫
$backupDb = new PDO('sqlite:' . $backupPath);
$backupDb->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

// 導(dǎo)出原數(shù)據(jù)庫的數(shù)據(jù)到備份數(shù)據(jù)庫
$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)");
}

// 關(guān)閉數(shù)據(jù)庫連接
$db = null;
$backupDb = null;

echo '數(shù)據(jù)備份成功！';
?>

[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
// 配置數(shù)據(jù)庫連接
$db = new PDO('sqlite:/path/to/database.db');
$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

// 清空原數(shù)據(jù)庫中的數(shù)據(jù)
$db->exec('DELETE FROM table_name');

// 打開備份的數(shù)據(jù)庫
$backupDb = new PDO('sqlite:/path/to/backup.sqlite');
$backupDb->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

// 導(dǎo)入備份數(shù)據(jù)庫的數(shù)據(jù)到原數(shù)據(jù)庫
$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)");
}

// 關(guān)閉數(shù)據(jù)庫連接
$db = null;
$backupDb = null;

echo '數(shù)據(jù)恢復(fù)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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