How to use PHP scripts to perform data backup on Linux servers

How to use PHP scripts to perform data backup on Linux servers

In daily website operation and maintenance work, data backup is an important task. With a complete data backup strategy, the security and reliability of website data can be ensured. This article will introduce how to use PHP scripts to back up data on a Linux server and provide specific code examples.

You can use some common command line tools to back up data on a Linux server, such as mysqldump for backing up MySQL database, tar for compressing files and directories. The following is a basic PHP script that can be executed to back up the MySQL database and file directory.

<?php

// MySQL数据库备份配置
$hostname = 'localhost';  // 数据库主机名
$username = 'username';   // 数据库用户名
$password = 'password';   // 数据库密码
$database = 'database';   // 数据库名称
$outputDir = '/path/to/backup';  // 备份文件存储路径

// 文件目录备份配置
$backupDirs = [
    '/path/to/dir1',
    '/path/to/dir2'
];
$backupDirName = 'backup_' . date('Y-m-d');  // 备份文件夹名称

// 创建备份目录
$backupPath = $outputDir . '/' . $backupDirName;
if (!file_exists($backupPath)) {
    mkdir($backupPath, 0755, true);
}

// 备份MySQL数据库
$mysqldumpCommand = "mysqldump --no-tablespaces -h{$hostname} -u{$username} -p{$password} {$database} > {$backupPath}/database.sql";
exec($mysqldumpCommand);

// 备份文件目录
foreach ($backupDirs as $dir) {
    $tarCommand = "tar -zcf {$backupPath}/" . basename($dir) . ".tar.gz -C {$dir} .";
    exec($tarCommand);
}

// 完成备份，输出备份文件路径
echo "Backup completed. Backup files are stored in: {$backupPath}";

?>

The above script first defines the related configuration of MySQL database and file directory backup. Where $hostname, $username, $password and $database are the information required to connect to the MySQL database. $outputDir is the path where the backup file is stored.

Next, the script creates a backup folder named with the current date and creates the folder through the mkdir function.

Then, back up the MySQL database through the mysqldump command and save the backup file to the backup folder just created. The backup command uses information related to the connection to the database.

Finally, use the tar command to back up the specified file directory and save the backup file to the backup folder just created.

After completing the backup, the script outputs the storage path of the backup file.

By executing the above script, the MySQL database and file directory can be backed up automatically. Configure this script into a scheduled task to perform backup operations regularly to ensure data security.

It should be noted that before using this script, you need to ensure that the relevant command line tools, such as mysqldump and tar, are installed on the server. At the same time, the relevant configurations in the script also need to be modified to adapt to the actual server environment and backup needs.

I hope this article can help readers understand how to use PHP scripts to back up data on a Linux server, and provide a reference for actual backup work.

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