yelin/extend/my/Backup.php

<?php
namespace my;
use think\Db;
use think\Config;
class Backup
{
    /**
     * 文件指针
     * @var resource
     */
    private $fp;
    /**
     * 备份文件信息 part - 卷号，name - 文件名
     * @var array
     */
    private $file;
    /**
     * 当前打开文件大小
     * @var integer
     */
    private $size = 0;

    /**
     * 数据库配置
     * @var integer
     */
    private $dbconfig = array();
    /**
     * 备份配置
     * @var integer
     */
    private $config = array(
        'path' => './public/data/',
        //数据库备份路径
        'part' => 20971520,
        //数据库备份卷大小
        'compress' => 0,
        //数据库备份文件是否启用压缩 0不压缩 1 压缩
        'level' => 9,
    );
    /**
     * 数据库备份构造方法
     * @param array  $file   备份或还原的文件信息
     * @param array  $config 备份配置信息
     */
    public function __construct($config = [])
    {
        $this->config = array_merge($this->config, $config);
        //初始化文件名
        $this->setFile();
        //初始化数据库连接参数
        $this->setDbConn();
        //检查文件是否可写
        if (!$this->checkPath($this->config['path'])) {
            throw new \Exception("The current directory is not writable");
        }
    }
    /**
     * 设置脚本运行超时时间
     * 0表示不限制，支持连贯操作
     */
    public function setTimeout($time=null)
    {
        if (!is_null($time)) {
           set_time_limit($time)||ini_set("max_execution_time", $time);
        }
        return $this;
    }
    /**
     * 设置数据库连接必备参数
     * @param array  $dbconfig   数据库连接配置信息
     * @return object 
     */
    public function setDbConn($dbconfig = [])
    {
        if (empty($dbconfig)) {
            $this->dbconfig = config('database');
            //$this->dbconfig = Config::get('database');
        } else {
            $this->dbconfig = $dbconfig;
        }
        return $this;
    }
    /**
     * 设置备份文件名
     * @param Array  $file  文件名字
     * @return object 
     */
    public function setFile($file = null)
    {
        if (is_null($file)) {
            $this->file = ['name' => date('Ymd-His'), 'part' => 1];
        } else {
            if (!array_key_exists("name", $file) && !array_key_exists("part", $file)) {
                $this->file = $file['1'];
            } else {
                $this->file = $file;
            }
        }
        return $this;
    }
    //数据类连接
    public static function connect()
    {
        return Db::connect();
    }
    //数据库表列表
    public function dataList($table = null,$type=1)
    {
        $db = self::connect();
        if (is_null($table)) {
            $list = $db->query("SHOW TABLE STATUS");
        } else {
            if ($type) {
                $list = $db->query("SHOW FULL COLUMNS FROM {$table}");
            }else{
                 $list = $db->query("show columns from {$table}");
            }
        }
        return array_map('array_change_key_case', $list);
        //$list;
    }
    //数据库备份文件列表
    public function fileList()
    {
        if (!is_dir($this->config['path'])) {
            mkdir($this->config['path'], 0755, true);
        }
        $path = realpath($this->config['path']);
        $flag = \FilesystemIterator::KEY_AS_FILENAME;
        $glob = new \FilesystemIterator($path, $flag);
        $list = array();
        foreach ($glob as $name => $file) {
            if (preg_match('/^\\w+-\\d{8,8}-\\d{6,6}-\\d+\\.sql(?:\\.gz)?$/', $name)) {
//                $name = sscanf($name, '%4s%2s%2s-%2s%2s%2s-%d');
                $name_arr = explode('-',$name);
                $length = strlen($name_arr['0']);
                $name = sscanf($name,"%".$length."s-%4s%2s%2s-%2s%2s%2s-%d");
//                $name = sscanf()
                $date = "{$name[1]}-{$name[2]}-{$name[3]}";
                $time = "{$name[4]}:{$name[5]}:{$name[6]}";
                $part = $name[7];
                if (isset($list["{$date} {$time}"])) {
                    $info = $list["{$date} {$time}"];
                    $info['part'] = max($info['part'], $part);
                    $info['size'] = $info['size'] + $file->getSize();
                } else {
                    $info['part'] = $part;
                    $info['size'] = $file->getSize();
                }
                $extension = strtoupper(pathinfo($file->getFilename(), PATHINFO_EXTENSION));
                $info['compress'] = $extension === 'SQL' ? '-' : $extension;
                $info['time'] = strtotime("$date".' '."$time");
                $info['name'] = $file->getFilename();
                $list["{$date} {$time}"] = $info;
            }
        }
        return $list;
    }
    public function getFile($type = '', $time = 0)
    {
        //
        if (!is_numeric($time)) {
            throw new \Exception("{$time} Illegal data type");
        }
        switch ($type) {
            case 'time':
                $name = date('Ymd-His', $time) . '-*.sql*';
                $path = realpath($this->config['path']) . DIRECTORY_SEPARATOR . $name;
                return glob($path);
                break;
            case 'timeverif':
                $name = date('Ymd-His', $time) . '-*.sql*';
                $path = realpath($this->config['path']) . DIRECTORY_SEPARATOR . $name;
                $files = glob($path);
                $list = array();
                foreach ($files as $name) {
                    $basename = basename($name);
                    $name_arr = explode('-',$basename);
                    $length = strlen($name_arr['0']);
                    $match = sscanf($basename, "%".$length."s-%4s%2s%2s-%2s%2s%2s-%d");
                    $gz = preg_match('/^\\w+-\\d{8,8}-\\d{6,6}-\\d+\\.sql.gz$/', $basename);
                    $list[$match[7]] = array($match[7], $name, $gz);
                }
                $last = end($list);
                if (count($list) === $last[0]) {
                    return $list;
                } else {
                    throw new \Exception("File {$files['0']} may be damaged, please check again");
                }
                break;
            case 'pathname':
                return "{$this->config['path']}{$this->file['name']}-{$this->file['part']}.sql";
                break;
            case 'filename':
                return "{$this->file['name']}-{$this->file['part']}.sql";
                break;
            case 'filepath':
                return $this->config['path'];
                break;
            default:
                $arr = array('pathname' => "{$this->config['path']}{$this->file['name']}-{$this->file['part']}.sql", 'filename' => "{$this->file['name']}-{$this->file['part']}.sql", 'filepath' => $this->config['path'], 'file' => $this->file);
                return $arr;
        }
    }
    //删除备份文件
    public function delFile($name)
    {
        if(file_exists($this->config['path'].$name)){
            unlink($this->config['path'].$name);
            return json(['msg'=>'删除成功','code'=>200]);;
        }else{
            return json(['msg'=>'文件不存在','code'=>500]);
        }
//        if ($time) {
//            $file = $this->getFile('time', $time);
//            array_map("unlink", $this->getFile('time', $time));
//            if (count($this->getFile('time', $time))) {
//                throw new \Exception("File {$path} deleted failed");
//            } else {
//                return $time;
//            }
//        } else {
//            throw new \Exception("{$time} Time parameter is incorrect");
//        }
    }
    /**
     * 下载备份
     * @param string $time
     * @param integer $part
     * @return array|mixed|string
     */
    public function downloadFile($time, $part = 0)
    {
        $file = $this->getFile('time', $time);
        $fileName = $file[$part];
        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 {
            throw new \Exception("{$time} File is abnormal");
        }
    }
    public function import($start)
    {
        //还原数据
        $db = self::connect();
        if ($this->config['compress']) {
            $gz = gzopen($this->config['path'].$this->file['name'], 'r');
            $size = 0;
        } else {
            $size = filesize($this->config['path'].$this->file['name']);
            $gz = fopen($this->config['path'].$this->file['name'], 'r');
        }
        $sql = '';
        if ($start) {
            $this->config['compress'] ? gzseek($gz, $start) : fseek($gz, $start);
        }
        for ($i = 0; $i < 1000; $i++) {
            $sql .= $this->config['compress'] ? gzgets($gz) : fgets($gz);
            if (preg_match('/.*;$/', trim($sql))) {
                if (false !== $db->execute($sql)) {
                    $start += strlen($sql);
                } else {
                    return false;
                }
                $sql = '';
            } elseif ($this->config['compress'] ? gzeof($gz) : feof($gz)) {
                return 0;
            }
        }
        return array($start, $size);
    }
    /**
     * 写入初始数据
     * @return boolean true - 写入成功，false - 写入失败
     */
    public function Backup_Init()
    {
        $sql = "-- -----------------------------\n";
        $sql .= "-- Think MySQL Data Transfer \n";
        $sql .= "-- \n";
        $sql .= "-- Host     : " . $this->dbconfig['hostname'] . "\n";
        $sql .= "-- Port     : " . $this->dbconfig['hostport'] . "\n";
        $sql .= "-- Database : " . $this->dbconfig['database'] . "\n";
        $sql .= "-- \n";
        $sql .= "-- Part : #{$this->file['part']}\n";
        $sql .= "-- Date : " . date("Y-m-d H:i:s") . "\n";
        $sql .= "-- -----------------------------\n\n";
        $sql .= "SET FOREIGN_KEY_CHECKS = 0;\n\n";
        return $this->write($sql);
    }
    /**
     * 备份表结构
     * @param  string  $table 表名
     * @param  integer $start 起始行数
     * @return boolean        false - 备份失败
     */
    public function backup($table, $start)
    {
        $this->file = ['name' => $table.'-'.date('Ymd-His'), 'part' => 1];
        $db = self::connect();
        // 备份表结构
        if (0 == $start) {
            $result = $db->query("SHOW CREATE TABLE `{$table}`");
            $sql = "\n";
            $sql .= "-- -----------------------------\n";
            $sql .= "-- Table structure for `{$table}`\n";
            $sql .= "-- -----------------------------\n";
            $sql .= "DROP TABLE IF EXISTS `{$table}`;\n";
            $sql .= trim($result[0]['Create Table']) . ";\n\n";
            if (false === $this->write($sql)) {
                return false;
            }
        }
        //数据总数
        $result = $db->query("SELECT COUNT(*) AS count FROM `{$table}`");
        $count = $result['0']['count'];
        //备份表数据
        if ($count) {
            //写入数据注释
            if (0 == $start) {
                $sql = "-- -----------------------------\n";
                $sql .= "-- Records of `{$table}`\n";
                $sql .= "-- -----------------------------\n";
                $this->write($sql);
            }
            //备份数据记录
            $result = $db->query("SELECT * FROM `{$table}` LIMIT {$start}, 1000");
            $list = $db->query("SHOW COLUMNS FROM `{$table}`");
            foreach ($result as $row) {
                // $row = array_map('addslashes', $row);
                $sss = 0;
                $rowsql = '';
                foreach($row as $v){
                  if(strpos($list[$sss]["Type"],'int') !== false || strpos($list[$sss]["Type"],'varchar') !== false){    
                  if($v === NULL){
                      $rowsql .= "NULL, ";
                  }else{
                      $rowsql .= "$v, ";
                  }
                  }else{
                      $rowsql .= "'$v', ";
                  }
                  $sss++;
                }
                $rowsql = substr($rowsql, 0, -2);
                $sql = "INSERT INTO `{$table}` VALUES (" . $rowsql . ");\n";
                if (false === $this->write($sql)) {
                    return false;
                }
            }
            //还有更多数据
            if ($count > $start + 1000) {
                //return array($start + 1000, $count);
                return $this->backup($table, $start + 1000);
            }
        }
        //备份下一表
        return 0;
    }
    /**
     * 优化表
     * @param  String $tables 表名
     * @return String $tables  
     */
    public function optimize($tables = null)
    {
        if ($tables) {
            $db = self::connect();
            if (is_array($tables)) {
                $tables = implode('`,`', $tables);
                $list = $db->query("OPTIMIZE TABLE `{$tables}`");
            } else {
                $list = $db->query("OPTIMIZE TABLE `{$tables}`");
            }
            if ($list) {
                return $list;
            } else {
                throw new \Exception("data sheet'{$tables}'Optimize mistakes please try again!");
            }
        } else {
            throw new \Exception("Please specify the table to be optimize!");
        }
    }
    /**
     * 分析表
     * @param  String $tables 表名
     * @return String $tables  
     */
    public function analyze($tables = null)
    {
        if ($tables) {
            $db = self::connect();
            if (is_array($tables)) {
                $tables = implode('`,`', $tables);
                $list = $db->query("ANALYZE TABLE `{$tables}`");
            } else {
                $list = $db->query("ANALYZE TABLE `{$tables}`");
            }
            if ($list) {
                return $list;
            } else {
                throw new \Exception("data sheet'{$tables}'Analyze mistakes please try again!");
            }
        } else {
            throw new \Exception("Please specify the table to be analyze!");
        }
    }
    /**
     * 修复表
     * @param  String $tables 表名
     * @return String $tables  
     */
    public function repair($tables = null)
    {
        if ($tables) {
            $db = self::connect();
            if (is_array($tables)) {
                $tables = implode('`,`', $tables);
                $list = $db->query("REPAIR TABLE `{$tables}`");
            } else {
                $list = $db->query("REPAIR TABLE `{$tables}`");
            }
            if ($list) {
                return $list;
            } else {
                throw new \Exception("data sheet'{$tables}'Repair mistakes please try again!");
            }
        } else {
            throw new \Exception("Please specify the table to be repaired!");
        }
    }
    /**
     * 写入SQL语句
     * @param  string $sql 要写入的SQL语句
     * @return boolean     true - 写入成功，false - 写入失败！
     */
    private function write($sql)
    {
        $size = strlen($sql);
        //由于压缩原因，无法计算出压缩后的长度，这里假设压缩率为50%，
        //一般情况压缩率都会高于50%；
        $size = $this->config['compress'] ? $size / 2 : $size;
        $this->open($size);
        return $this->config['compress'] ? @gzwrite($this->fp, $sql) : @fwrite($this->fp, $sql);
    }
    /**
     * 打开一个卷，用于写入数据
     * @param  integer $size 写入数据的大小
     */
    private function open($size)
    {
        if ($this->fp) {
            $this->size += $size;
            if ($this->size > $this->config['part']) {
                $this->config['compress'] ? @gzclose($this->fp) : @fclose($this->fp);
                $this->fp = null;
                $this->file['part']++;
                session('backup_file', $this->file);
                $this->Backup_Init();
            }
        } else {
            $backuppath = $this->config['path'];
            $filename = "{$backuppath}{$this->file['name']}-{$this->file['part']}.sql";
            if ($this->config['compress']) {
                $filename = "{$filename}.gz";
                $this->fp = @gzopen($filename, "a{$this->config['level']}");
            } else {
                $this->fp = @fopen($filename, 'a');
            }
            $this->size = filesize($filename) + $size;
        }
    }
    /**
     * 检查目录是否可写
     * @param  string   $path    目录
     * @return boolean
     */
    protected function checkPath($path)
    {
        if (is_dir($path)) {
            return true;
        }
        if (mkdir($path, 0755, true)) {
            return true;
        } else {
            return false;
        }
    }
    /**
     * 析构方法，用于关闭文件资源
     */
    public function __destruct()
    {
        $this->config['compress'] ? @gzclose($this->fp) : @fclose($this->fp);
    }

    /**
     * 导出全部数据
     */
    public function sql_all(){
        $database = \think\facade\Config::get('database.');
        $host=$database['hostname'];
        $user=$database['username'];
        $password=$database['password'];
        $dbname=$database['database'];
        $db=new \PDO("mysql:host=$host;dbname=$dbname", "$user", "$password");
        $db->query('set names utf8');

        $mysql= "set names utf8;";

        $db->query("$mysql");
        $res=$db->query("show tables");

        while($t=$res->fetch()){
            $table=$t[0];
            $q2=$db->query("show create table `$table`");
            $sql=$q2->fetch();
            $mysql.=$sql['Create Table'].";\n";

            $q3=$db->query("select * from `$table`");
            while($data=$q3->fetch(\PDO::FETCH_ASSOC)){
                $keys=array_keys($data);
                $keys=array_map('addslashes',$keys);
                $keys=join('`,`',$keys);
                $keys="`".$keys."`";
                $vals=array_values($data);

                $vals=array_map('addslashes',$vals);

                $vals=join("','",$vals);
                $vals="'".$vals."'";
                $mysql.="insert into `$table`($keys) values($vals);\n";
            }
            $mysql.="\n";
        }
        $filename=$dbname."-".date('Ymd-His')."-1.sql";
        $fp = fopen($this->config['path'].$filename,'w');
        fputs($fp,$mysql);
        fclose($fp);
        return 0;
    }
}