如何使用ThinkPHP6实现数据库备份与恢复

<?php
return [
    // 数据库类型
    'type'        => 'mysql',
    // 数据库连接DSN配置
    'dsn'         => '',
    // 服务器地址
    'hostname'    => 'localhost',
    // 数据库名
    'database'    => 'test',
    // 数据库用户名
    'username'    => 'root',
    // 数据库密码
    'password'    => 'root',
    // 数据库连接端口
    'hostport'    => '3306',
    // 数据库连接参数
    'params'      => [],
    // 数据库编码默认采用utf8
    'charset'     => 'utf8',
    // 数据库表前缀
    'prefix'      => 'think_',
    // 数据库调试模式
    'debug'       => false,
    // 数据库备份路径，没有则自动创建
    'path'        => '',
    // 数据库备份卷大小，单位为字节，设为0表示不限制备份大小
    'part'        => 20971520,
    // 数据库备份文件压缩格式，这里是gzip
    'compress'    => 'gzip',
    // 数据库备份文件名
    'filename'    => '',
    // 数据库备份文件是否需要压缩
    'zip'         => true,
    // 数据库备份文件是否需要分卷备份
    'split'       => true,
    // 数据库备份时是否将存储过程和触发器一起备份
    'level'       => 9,
    // 数据库备份文件的存储路径，最好为绝对路径，这也是最关键的路径
    'path'        => '/data/mysql/',
];

<?php
declare(strict_types=1);

namespace appcontroller;

use thinkacadeDb;

class BackupController
{
    protected $backupConfig;

    public function __construct()
    {
        $this->backupConfig = config('database');
    }

    public function backup()
    {
        // 防止备份数据过程超时
        set_time_limit(0);

        $database = $this->backupConfig['database'];
        $filename = date('Ymd-His', time()) . ".sql";
        $path = $this->backupConfig['path'].$filename;

        // 检查目录是否存在或者是否有权限写入
        if(!is_dir($this->backupConfig['path'])){
            mkdir($this->backupConfig['path'], 0755, true);
        }else{
            if(!is_writeable($this->backupConfig['path'])){
                chmod($this->backupConfig['path'], 0755);
            }
        }

        // 备份所有数据表
        $result = Db::query("SHOW TABLES");

        $tables = array();
        foreach($result as $index => $row){
            $tables[] = $row['Tables_in_'.$database];
        }

        // 备份所有表结构和表数据
        $content = '';
        foreach($tables as $table){
            $content = $content . "/*" . PHP_EOL;
            $content = $content . "表名：" . $table . PHP_EOL;
            $content = $content . "表结构：" . PHP_EOL;
            $content = $content . "*/" . PHP_EOL;
            $content = $content . $this->backupTableSchema($table);
            $content = $content . "/*" . PHP_EOL;
            $content = $content . "表数据：" . PHP_EOL;
            $content = $content . "*/" . PHP_EOL;
            $content = $content . $this->buildInsertSql($table);
        }

        // 是否需要压缩
        if ($this->backupConfig['zip']) {
            $zip = new ZipArchive();
            $zipfilename = $this->backupConfig['path'] . date('Ymd-His', time()) . ".zip";
            if ($zip->open($zipfilename, ZipArchive::OVERWRITE) === TRUE) {
                $zip->addFile($path,$filename);
                $zip->close();
                // 删除非压缩的文件
                unlink($path);
            } else {
                // 备份失败
            }
        }
    }

    // 备份表结构
    protected function backupTableSchema($table)
    {
        $database = $this->backupConfig['database'];
        $result = Db::query("SHOW CREATE TABLE `" . $table . "`");
        $create = $result[0]['Create Table'] . ";" . PHP_EOL.PHP_EOL;
        return $create;
    }

    // 备份表数据
    protected function buildInsertSql($table)
    {
        $database = $this->backupConfig['database'];
        $result = Db::query("SELECT * FROM `" . $table . "`");
        $insert = '';
        foreach ($result as $key => $value) {
            $keys = array_keys($value);
            $values = array_map(array(Db::class, 'quote'), array_values($value));
            $values = join(",", $values);
            $insert .= "INSERT INTO `" . $table . "` (`" . join("`,`", $keys) . "`) VALUES (" . $values . ");" . PHP_EOL;
        }
        $insert .= PHP_EOL;
        return $insert;
    }
}

http://localhost/backup/backup

<?php
declare(strict_types=1);

namespace appcontroller;

use thinkacadeDb;

class RecoveryController
{
    protected $backupConfig;

    public function __construct()
    {
        $this->backupConfig = config('database');
    }

    public function recovery()
    {
        // 防止还原数据过程超时
        set_time_limit(0);
        ini_set('memory_limit', '1024M');

        $filename = input('get.filename');

        // 读取备份文件
        if ($this->backupConfig['zip']) {
            $zip = new ZipArchive();
            if ($zip->open($this->backupConfig['path'].$filename) === true) {
                $filename = $zip->getNameIndex(0);
                $zip->extractTo($this->backupConfig['path']);
                $zip->close();
            }
        }

        $content = file_get_contents($this->backupConfig['path'] . $filename);

        // 使用";"分割内容
        $statements = explode(";", $content);

        // 开始事务
        Db::startTrans();

        foreach ($statements as $index => $stmt) {
            if (trim($stmt) === '') {
                continue;
            }
            $results = Db::query($stmt);
            if ($results === false) {
                Db::rollback();
                return false;
            }
        }

        // 提交事务
        Db::commit();

        // 删除非压缩的文件
        unlink($this->backupConfig['path'] . $filename);

        return true;
    }
}

http://localhost/recovery/recovery?filename=20200101-121212.sql.zip