如何进行PHP秒杀系统的数据备份和恢复方案

<?php
// 设定备份文件保存路径
$backupDir = '/backup/db';

// 设定备份文件名
$backupFile = $backupDir . '/db_backup_' . date('Ymd_His') . '.sql';

// 获取数据库配置
$host = 'localhost';
$port = '3306';
$dbName = 'your_database_name';
$user = 'your_username';
$password = 'your_password';

// 使用mysqldump命令备份数据库
$command = "mysqldump -h {$host} -P {$port} -u {$user} -p{$password} {$dbName} > {$backupFile}";
exec($command);

echo "数据库备份成功!
";
?>

<?php
// 设定备份文件保存路径
$backupDir = '/backup/db';

// 设定保存期限（单位：天）
$keepDays = 7;

// 删除过期的备份文件
$files = glob($backupDir . '/db_backup_*.sql');
foreach ($files as $file) {
    if (time() - filemtime($file) > $keepDays * 24 * 3600) {
        unlink($file);
    }
}

echo "过期备份文件删除成功!
";
?>

<?php
// 获取数据库配置
$host = 'localhost';
$port = '3306';
$dbName = 'your_database_name';
$user = 'your_username';
$password = 'your_password';

// 设定备份文件路径
$backupFile = '/backup/db/db_backup_20210101_120000.sql';

// 使用mysql命令恢复数据库
$command = "mysql -h {$host} -P {$port} -u {$user} -p{$password} {$dbName} < {$backupFile}";
exec($command);

echo "数据库恢复成功!
";
?>

<?php
// 设定备份文件保存路径
$backupDir = '/backup/db';

// 获取最新的备份文件
$files = glob($backupDir . '/db_backup_*.sql');
$newestFile = end($files);

// 获取数据库配置
$host = 'localhost';
$port = '3306';
$dbName = 'your_database_name';
$user = 'your_username';
$password = 'your_password';

// 使用mysql命令恢复数据库
$command = "mysql -h {$host} -P {$port} -u {$user} -p{$password} {$dbName} < {$newestFile}";
exec($command);

echo "数据库恢复成功!
";
?>