MySQL备份脚本

<?php

    //备份mysql
    
    set_time_limit(0);
    date_default_timezone_set(‘PRC‘);
    
    //配置
    $configs = array(
        ‘host1‘=>array(
            ‘localhost‘,
            ‘root‘,
            ‘password‘,
            array(),  //为空备份全部数据库，否则备份这些数据库
            ‘D:/xampp/mysql/bin/mysqldump‘,    //备份工具
            dirname(__FILE__)."/localhost",  //目录加主机名
            5,  //删除前5天的SQL文件
        ),);

    foreach($configs as $config) {
        backup($config);
    }

    function backup($config) {
        list($host, $username, $password, $databases, $backuptool, $backupdir, $day) = $config;
        $command = "$backuptool -u $username -h $host -p$password %s > %s";  
        $logsfile = $backupdir.‘/‘.date(‘ymd‘).‘.log‘;
        $backfilename = $backupdir.‘/‘.date(‘Ymd‘)."%s.sql";   //备份的SQL文件，以数据库命名
        
        if(!is_dir($backupdir)) {
            mkdir($backupdir, 0755 , true); 
        }
        
        //删除前十天的备份文件
        get_dir_files($backupdir, $returnval);
        if($returnval) {
            foreach($returnval as $v) {
                $time = filemtime($v);
                if($time < strtotime("-$day day") && (pathinfo($v,PATHINFO_EXTENSION))==‘zip‘) {
                    unlink($v);
                }
            }
        }
        
        if(!$databases) {
            $databases = getdatabases($host, $username, $password);
        }

        //开始备份
        foreach($databases as $database) {
            $outputfile = sprintf($backfilename, $database);
            $execcommand = sprintf($command, $database, $outputfile);

            try {
                if(system($execcommand) === false) {
                    throw new Exception(‘execute backup command error!‘);
                }
                if(file_exists($outputfile)) {
                    $zip = new ZipArchive();
                    $filename = pathinfo($outputfile,PATHINFO_FILENAME);
                    $zipname = $filename.‘.zip‘;
                    if($zip->open($zipname, ZIPARCHIVE::OVERWRITE) === true) {
                        $zip->addFile($outputfile, $filename.‘.‘.pathinfo($outputfile,PATHINFO_EXTENSION));
                        
                        $zip->close();
                    }else {
                        throw new Exception(‘ZipArchive open error!‘);
                    }
                    $resource = file_get_contents($zipname);
                    file_put_contents($backupdir.‘/‘.$zipname, $resource);
                    unlink($zipname);
                    unlink($outputfile);
                    $message = date(‘Y-m-d H:i:s‘)."$database backup complete!\r\n";
                    logs($logsfile, $message);
                }
            }catch(Exception $e) {
                $message = date(‘Y-m-d H:i:s‘).$e->getLine().‘ ‘.$e->getMessage()."\r\n";
                logs($logsfile, $message);
            }

        }
    }

    function getdatabases($host, $username, $password) {
        $databases = array();
        try {
                $mysqli = new Mysqli($host, $username, $password);
                $result = $mysqli->query("show databases");
                if($result) {
                    while($row = $result->fetch_row()) {
                        (current($row)!=‘information_schema‘ && current($row)!=‘mysql‘ && current($row)!=‘performance_schema‘) && $databases[] = current($row);
                    }
                    $result->free_result();
                }
                $mysqli->close();
                
            }catch(Exception $e) {
                $message = date(‘Y-m-d H:i:s‘).$e->getLine().‘ ‘.$e->getMessage()."\r\n";
                logs($logsfile, $message);
        }
        return $databases;
    }
    
    function logs($file, $contents) {
        $dirname = dirname($file);
        try {
            if(!is_dir(dirname($file)) || !is_writeable(dirname($file))) {
                throw new Exception("file is not direcotory or file can‘t write");
            }
            file_put_contents($file, $contents, FILE_APPEND);
        }catch(Exception $e) {
            $message = date(‘Y-m-d H:i:s‘).$e->getLine.‘ ‘.$e->getMessage()."\r\n";
            logs($logfile, $message);
        }
    }
    
    
    //获取当前目录下的文件（不包含子文件夹）
    function get_dir_files($currPath, &$returnVal=array()) {
        if(is_dir($currPath)) {
            $currPath = (substr($currPath,-1,1)==‘/‘)?substr($currPath,0,strlen($currPath)-1):$currPath;

            if($handler = opendir($currPath)) {
                while(($fileName = readdir($handler)) !== false) {
                    if($fileName != ‘.‘ && $fileName != ‘..‘ && $fileName[0] != ‘.‘) {
                        if(is_file($currPath . ‘/‘ . $fileName)) {
                            $returnVal[] = $currPath . ‘/‘ . $fileName;
                        }
                    }
                }
                closedir($handler);
            }
        }
    }
?>

#!/bin/sh
# sed -i ‘s/^M//g‘ /home/taskschd/backup.sh
#注意：^M的输入方式是 Ctrl + v ，然后Ctrl + M
dbs=(test)
ROOT_DIR=/home/backup/
for dbname in ${dbs[@]}
 do
  #备份数据
  BACKUP_DIR=$ROOT_DIR$dbname‘_‘$(date +%Y%m%d).sql
  /usr/local/mysql/bin/mysqldump --opt -uroot -pabc $dbname > $BACKUP_DIR
  #删除三天前数据
  delete_file=$dbname‘_‘$(date -d "-5 day" "+%Y%m%d")‘.sql‘  
  rm $ROOT_DIR$delete_file  
 done