ThinkPHP5.0 数据库的备份、下载、还原、删除

参考文档：
https://blog.csdn.net/qq_42455095/article/details/84313754#commentBox
https://blog.csdn.net/qq_42249896/article/details/85238523
https://blog.csdn.net/cplvfx/article/details/86494487
自己整理了一个文档~~~
效果图：

一、下载类文件
https://github.com/joytom/db_backup
按照下图存放类文件

我对Baksql.php文件进行了一点改动,代码如下：
主要修改的是get_dbdata方法，我也做了标记

<?php
/**
 * 备份数据库的扩展类
*/
namespace org;

class Baksql {
    private $config=[];
    private $handler;
    private $tables = array();//需要备份的表
    private $begin; //开始时间
    private $error;//错误信息

    public function __construct($config) {
        /记住创建这个存放备份文件目录，不然会报错
        $config['path']=ROOT_PATH . 'public' . DS .'static'. DS .'data/'; //默认目录
        $config["sqlbakname"]=date("YmdHis",time()).".sql";//默认保存文件
        $this->config = $config;
        
        $this->begin = microtime(true);
        header("Content-type: text/html;charset=utf-8");
        $this->connect();
    }
    //首次进行pdo连接
    private function connect() {
        try{
           $this->handler =new \PDO("{$this->config['type']}:host={$this->config['hostname']};port={$this->config['hostport']};dbname={$this->config['database']};",
                $this->config['username'],
                $this->config['password'], 
                array(
                    \PDO::MYSQL_ATTR_INIT_COMMAND => "SET NAMES {$this->config['charset']};",
                    \PDO::ATTR_ERRMODE =>  \PDO::ERRMODE_EXCEPTION, 
                    \PDO::ATTR_DEFAULT_FETCH_MODE => \PDO::FETCH_ASSOC
                )); 
        }catch (PDOException $e) {
            die ("Error!: " . $e->getMessage() . "
");
        }
        
    }
     /**
     * 查询
     * @param string $sql
     * @return mixed
     */
    private function query($sql = '')
    {
        $stmt = $this->handler->query($sql);
        $stmt->setFetchMode(\PDO::FETCH_NUM);
        $list = $stmt->fetchAll();
        return $list;
    }
     /**
     * 获取全部表
     * @param string $dbName
     * @return array
     */
    private function get_dbname($dbName = '*') {
         $sql = 'SHOW TABLES';
        $list = $this->query($sql);
        $tables = array();
        foreach ($list as $value)
        {   
            $tables[] = $value[0];
        }
        return $tables;        
    }
    /**
     * 获取表定义语句
     * @param string $table
     * @return mixed
     */
    private function get_dbhead($table = '')
    {
        $sql = "SHOW CREATE TABLE `{$table}`";
        $ddl = $this->query($sql)[0][1] . ';';
        return $ddl;
    }
    /**
     * 获取表数据
     * @param string $table
     * @return mixed
     */
    private function get_dbdata($table = '')
    {
        $sql = "SHOW COLUMNS FROM `{$table}`";
        $list = $this->query($sql);
        //字段
        $columns = '';
        //需要返回的SQL
        $query = '';
        foreach ($list as $value)
        {
            $columns .= "`{$value[0]}`,";
        }
        $columns = substr($columns, 0, -1);
        $data = $this->query("SELECT * FROM `{$table}`");
        foreach ($data as $value)
        {
            $dataSql = '';
      /我的数据库中有 上传图片的路径带有 \特殊字符 备份时消失了
      /数据库时候路径中的反斜杠会丢失，所以导出的时候要再给他加一个反斜杠///
            $value=array_map('addslashes', $value);//给预定义字符加反斜杠
            //原来的代码
//            foreach ($value as $v)
//            {
//                $dataSql .= "'{$v}',";
//            }

           
	/1.程序生成的代码，字段没有字符集；主要出现在varchar类型
    /2.程序生成的代码，int字段的数据被加单引号''//
             //修改
     		/**
             * 2019-07-25 xiaoxia  修改后
             * */
            //cp循环次数
            $cp_loop_time=0;
            foreach ($value as $v)
            {
                if(strpos($list[$cp_loop_time][1],'int') !== false || strpos($list[$cp_loop_time][1],'double') !== false )
                {
                    if($v==null)
                    {
                        $dataSql .= "NULL,";
                    }
                    else{
                        $dataSql .= "{$v},";
                    }
                }
                else{
                    $dataSql .= "'{$v}',";
                }
                $cp_loop_time++;
            }
            /**
             * 2019-07-25 xiaoxia 修改结束
             * */


            $dataSql = substr($dataSql, 0, -1);
            $query .= "INSERT INTO `{$table}` ({$columns}) VALUES ({$dataSql});\r\n";
        }

        return $query;
    }
    /**
     * 写入文件
     * @param array $tables
     * @param array $ddl
     * @param array $data
     */
    private function writeToFile($tables = array(), $ddl = array(), $data = array())
    {
        $str = "/*\r\nMySQL Database Backup Tools\r\n";
        $str .= "Server:{$this->config['hostname']}:{$this->config['hostport']}\r\n";
        $str .= "Database:{$this->config['database']}\r\n";
        $str .= "Data:" . date('Y-m-d H:i:s', time()) . "\r\n*/\r\n";
        $str .= "SET FOREIGN_KEY_CHECKS=0;\r\n";
        $i = 0;
        foreach ($tables as $table)
        {
            $str .= "-- ----------------------------\r\n";
            $str .= "-- Table structure for {$table}\r\n";
            $str .= "-- ----------------------------\r\n";
            $str .= "DROP TABLE IF EXISTS `{$table}`;\r\n";
            $str .= $ddl[$i] . "\r\n";
            $str .= "-- ----------------------------\r\n";
            $str .= "-- Records of {$table}\r\n";
            $str .= "-- ----------------------------\r\n";
            $str .= $data[$i] . "\r\n";
            $i++;
        }
              
        if(!file_exists($this->config['path'])){mkdir($this->config['path']);}
        return file_put_contents($this->config['path'].$this->config['sqlbakname'], $str) ? '备份成功!花费时间' . round(microtime(true) - $this->begin,2) . 'ms' : '备份失败!';
    }
    /**
     * 设置要备份的表
     * @param array $tables
     */
    private function setTables($tables = array())
    {
        if (!empty($tables) && is_array($tables))
        {
            //备份指定表
            $this->tables = $tables;
        }
        else
        {
            //备份全部表
            $this->tables = $this->get_dbname();
        }
    }
    /**
     * 备份
     * @param array $tables
     * @return bool
     */
    public function backup($tables = array())
    {
        //存储表定义语句的数组
        $ddl = array();
        //存储数据的数组
        $data = array();
        $this->setTables($tables);
        if (!empty($this->tables))
        {
            foreach ($this->tables as $table)
            {
                $ddl[] = $this->get_dbhead($table);
                $data[] = $this->get_dbdata($table);
            }
            
            //开始写入
            return $this->writeToFile($this->tables, $ddl, $data);
        }
        else
        {
            $this->error = '数据库中没有表!';
            return false;
        }
    }
    /**
     * 错误信息
     * @return mixed
     */
    public function getError()
    {
        return $this->error;
    }
    public function restore($filename = '')
    {
        $path=$this->config['path'].$filename;
        if (!file_exists($path))
        {
            $this->error('SQL文件不存在!');
            return false;
        }
        else
        {
            $sql = $this->parseSQL($path);
            //dump($sql);die;
            try
            {
                $this->handler->exec($sql);
                echo '还原成功!花费时间', round(microtime(true) - $this->begin,2) . 'ms';
            }
            catch (PDOException $e)
            {
                $this->error = $e->getMessage();
                return false;
            }
        }
    }
 
    /**
     * 解析SQL文件为SQL语句数组
     * @param string $path
     * @return array|mixed|string
     */
    private function parseSQL($path = '')
    {
        $sql = file_get_contents($path);
        $sql = explode("\r\n", $sql);
        //先消除--注释
        $sql = array_filter($sql, function ($data)
        {
            if (empty($data) || preg_match('/^--.*/', $data))
            {
                return false;
            }
            else
            {
                return true;
            }
        });
        $sql = implode('', $sql);
        //删除/**/注释
        $sql = preg_replace('/\/\*.*\*\//', '', $sql);
        return $sql;
    }
    /**
     * 下载备份
     * @param string $fileName
     * @return array|mixed|string
     */
    public function downloadFile($fileName) {
        $fileName=$this->config['path'].$fileName;
        if (file_exists($fileName)){
            ob_end_clean();
            header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
            header('Content-Description: File Transfer');
            header('Content-Type: application/octet-stream');
            header('Content-Length: ' . filesize($fileName));
            header('Content-Disposition: attachment; filename=' . basename($fileName));
            readfile($fileName);
        }else{
            $this->error="文件有错误！";
        }

    }
    /**
     * 获取文件是时间
     * @param string $file
     * @return string
     */
    private function getfiletime($file){
        $path=$this->config['path'].$file;
        $a = filemtime($path);
        $time = date("Y-m-d H:i:s", $a);
        return $time;
    }
    /**
     * 获取文件是大小
     * @param string $file
     * @return string
     */
    private function getfilesize($file){
        $perms=stat($this->config['path'].$file);
        $size = $perms['size'];
        $a    = ['B', 'KB', 'MB', 'GB', 'TB'];
        $pos  = 0;
        while ($size >= 1024) {
            $size /= 1024;
            $pos++;
        }
        return round($size, 2). $a[$pos];
    }
    
    /**
     * 获取文件列表
     * @param string $Order 级别
     * @return array
     */
    public function get_filelist($Order = 0) {
        $FilePath=$this->config['path'];
//        print_r($FilePath);die;
        $FilePath = opendir($FilePath);
//        $FilePath = scandir($FilePath);
        $FileAndFolderAyy=array();
        $i=1;
        while (false !== ($filename = readdir($FilePath))) {
            if ($filename!="." && $filename!=".."){
                $i++;
                $FileAndFolderAyy[$i]['name'] = $filename;
                $FileAndFolderAyy[$i]['time'] = $this->getfiletime($filename);
                $FileAndFolderAyy[$i]['size'] = $this->getfilesize($filename);
            }
            
        }
        $Order == 0 ? sort($FileAndFolderAyy) : rsort($FileAndFolderAyy);
        return $FileAndFolderAyy;
    }
    public function delfilename($filename){
        $path=$this->config['path'].$filename; 
        if (@unlink($path)) {return '删除成功';}
    }
}

?>

二、控制器实例化该类文件：
当前我的控制器是admin2/System
System.php

<?php

namespace app\admin2\controller;

use think\Controller;
use org\Baksql;
use think\Config;
class System extends Controller
{
    //数据库备份
    public function mysqllist()
    {
        //获取操作内容：（备份/下载/还原/删除）数据库
        $type = input("type");
        //获取需要操作的数据库名字
        $name = input("name");
        $backup=new Baksql(Config::get("database"));
        //$backup = new \org\Baksql(\think\Config::get("database"));
        switch ($type) {
            //备份
            case "backup":
                $info = $backup->backup();
                $this->success("$info", 'admin2/system/mysqllist');
                break;
            //下载
            case "dowonload":
                $info = $backup->downloadFile($name);
                $this->success("$info", 'admin2/system/mysqllist');
                break;
            //还原
            case "restore":
                $info = $backup->restore($name);
                $this->success("$info", 'admin2/system/mysqllist');
                break;
            //删除
            case "del":
                $info = $backup->delfilename($name);
                $this->success("$info", 'admin2/system/mysqllist');
                break;
            //如果没有操作，则查询已备份的所有数据库信息
            default:
                $len=count($backup->get_filelist());
                return $this->fetch("system/mysqllist", ["backuplist" => array_reverse($backup->get_filelist()),"len"=>$len]);//将信息由新到老排序
        }
    }
}

三、视图层
mysqllist.html

1.H-ui框架写法 （有分页搜索功能，框架文件自己官网看文档自行引入）

<div class="ibox-content">
    <div class="">
        <i class="Hui-iconfont">i> <span class="bold">添加备份span>a>
    div>
    <table class="table table-border table-bordered table-bg table-sort"  style="text-align: center">
        <thead>
        <tr class="text-c">
            <td>序号td>
            <th style="display: none" >排序th>
            <td>备份名称td>
            <td>备份时间td>
            <td>备份大小td>
            <td>操作td>
        tr>
        thead>
        <tbody>
        {volist name="backuplist" id="vo"}
        <tr class="text-c" >
            <td>{$key+1}td>
            <td style="display: none"><input type="text" class="input-text text-c" value="1">td>
            <td>{$vo.name}td>
            <td>{$vo.time}td>
            <td>{$vo.size}td>
            <td width="25%">
                <a  href="{:url('mysqllist',['type'=>'dowonload','name'=>$vo.name])}" class="btn btn-success radius"><i class="Hui-iconfont">i> <span class="bold">下载span>a>
                <a  href="{:url('mysqllist',['type'=>'restore','name'=>$vo.name])}" class="btn btn-secondary   radius" onclick="return confirm('备份还原后仅会显示当前备份的数据库的信息，您确定还原备份吗 ?')"><i class="Hui-iconfont">i> <span class="bold">还原span>a>
                <a  href="{:url('mysqllist',['type'=>'del','name'=>$vo.name])}"  class="btn btn-warning radius" onclick="return confirm('数据库备份一旦删除不可找回，您确定操作吗?')"><i class="Hui-iconfont">i> <span class="bold">删除span>a>
            td>
        tr>
        {/volist}
        tbody>
    table>
div>
<script>
    $('.table-sort').dataTable({
        "aaSorting": [[ 1, "desc" ]],//默认第几个排序
        "bStateSave": true,//状态保存
        "aoColumnDefs": [
            //{"bVisible": false, "aTargets": [ 3 ]} //控制列的隐藏显示
            {"orderable":false,"aTargets":[1,"desc"]}// 制定列不参与排序
        ]
    });
script>

//或
2.Bootstrap框架视图：

<div class="ibox-content">
    <div class="">
        <i class="glyphicon glyphicon-plus">i> <span class="bold">添加备份span>a>
    div>
    <table class="table table-striped table-bordered table-hover dataTables-example"  style="text-align: center">
        <thead>
        <tr>
            <td>序号td>
            <td>备份名称td>
            <td>备份时间td>
            <td>备份大小td>
            <td>操作td>
        tr>
        thead>
        <tbody>
        {volist name="backuplist" id="vo"}
        <tr class="gradeX" >
            <td>{$key+1}td>
            <td>{$vo.name}td>
            <td>{$vo.time}td>
            <td>{$vo.size}td>
            <td width="25%">
                <a  href="{:url('mysqllist',['type'=>'dowonload','name'=>$vo.name])}" class="btn btn-success "><i class="glyphicon glyphicon-download-alt">i> <span class="bold">下载span>a>
                <a  href="{:url('mysqllist',['type'=>'restore','name'=>$vo.name])}" class="btn btn-info " onclick="return confirm('备份还原后仅会显示当前备份的数据库的信息，您确定还原备份吗 ?')"><i class="glyphicon glyphicon-repeat">i> <span class="bold">还原span>a>
                <a  href="{:url('mysqllist',['type'=>'del','name'=>$vo.name])}"  class="btn btn-warning" onclick="return confirm('数据库备份一旦删除不可找回，您确定操作吗?')"><i class="fa fa-warning">i> <span class="bold">删除span>a>
            td>
        tr>
        {/volist}
        tbody>
    table>
div>

注意这里的：

 //mysqllist指的是控制器里的mysqllist方法名
 href="{:url('mysqllist',['type'=>'del','name'=>$vo.name])}"

$this->success("$info", 'admin2/system/mysqllist');//指的是成功之后跳转的页面路由