MySQL backup script, mysql script_PHP tutorial

<?<span>php

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

    </span><span>foreach</span>(<span>$configs</span> <span>as</span> <span>$config</span><span>) {
        </span><span>$logsfile</span> = <span>$config</span>[5].'/'.<span>date</span>('ymd').'.log'<span>;
        logs(</span><span>$logsfile</span>, <span>$config</span>[0]." backup\n"<span>);
        backup(</span><span>$config</span><span>);
    }

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

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

            </span><span>try</span><span> {
                </span><span>if</span>(<span>system</span>(<span>$execcommand</span>) === <span>false</span><span>) {
                    </span><span>throw</span> <span>new</span> <span>Exception</span>('execute backup command error!'<span>);
                }
                
                </span><span>//</span><span>文件过大时会压缩失败（测试的那个SQL文件4.62G，压缩失败，没创建那个压缩文件。测试2.81G可以）</span>
                <span>if</span>(<span>file_exists</span>(<span>$outputfile</span><span>)) {
                    </span><span>$zip</span> = <span>new</span><span> ZipArchive();
                    </span><span>$filename</span> = <span>pathinfo</span>(<span>$outputfile</span>,<span>PATHINFO_FILENAME);
                    </span><span>$zipname</span> = <span>$backupdir</span>.'/'.<span>$filename</span>.'.zip';  <span>//</span><span>zip文件的路径</span>
                    <span>if</span>(<span>$zip</span>->open(<span>$zipname</span>, ZIPARCHIVE::OVERWRITE) === <span>true</span><span>) {
                        </span><span>$zip</span>->addFile(<span>$outputfile</span>, <span>$filename</span>.'.'.<span>pathinfo</span>(<span>$outputfile</span>,<span>PATHINFO_EXTENSION));
                        
                        </span><span>$zip</span>-><span>close();
                    }</span><span>else</span><span> {
                        </span><span>throw</span> <span>new</span> <span>Exception</span>('ZipArchive open error!'<span>);
                    }
                }
                
                </span><span>if</span>(!<span>file_exists</span>(<span>$zipname</span>) || (<span>filesize</span>(<span>$zipname</span>)==0<span>)) {
                    </span><span>throw</span> <span>new</span> <span>Exception</span>('ZipArchive create error!'<span>);
                }
                
                </span><span>$message</span> = <span>date</span>('Y-m-d H:i:s')."<span>$database</span> backup complete!\r\n"<span>;
                logs(</span><span>$logsfile</span>, <span>$message</span><span>);
            }</span><span>catch</span>(<span>Exception</span> <span>$e</span><span>) {
                </span><span>$message</span> = <span>date</span>('Y-m-d H:i:s').<span>$e</span>->getLine().' '.<span>$e</span>->getMessage()."\r\n"<span>;
                logs(</span><span>$logsfile</span>, <span>$message</span><span>);
            }

        }
    }

    </span><span>function</span> getdatabases(<span>$host</span>, <span>$username</span>, <span>$password</span><span>) {
        </span><span>$databases</span> = <span>array</span><span>();
        
        </span><span>try</span><span> {
            </span><span>$mysqli</span> = <span>new</span> Mysqli(<span>$host</span>, <span>$username</span>, <span>$password</span><span>);
            </span><span>$result</span> = <span>$mysqli</span>->query("show databases"<span>);
            </span><span>if</span>(<span>$result</span><span>) {
                </span><span>while</span>(<span>$row</span> = <span>$result</span>-><span>fetch_row()) {
                    (</span><span>current</span>(<span>$row</span>)!='information_schema' && <span>current</span>(<span>$row</span>)!='mysql' && <span>current</span>(<span>$row</span>)!='performance_schema') && <span>$databases</span>[] = <span>current</span>(<span>$row</span><span>);
                }
                </span><span>$result</span>-><span>free_result();
                </span><span>$mysqli</span>-><span>close();
            }</span><span>else</span><span> {
                </span><span>throw</span> <span>new</span> <span>Exception</span>('No databases!'<span>);
            }
        }</span><span>catch</span>(<span>Exception</span> <span>$e</span><span>) {
            </span><span>$message</span> = <span>date</span>('Y-m-d H:i:s').<span>$e</span>->getLine().' '.<span>$e</span>->getMessage()."\r\n"<span>;
            logs(</span><span>$logsfile</span>, <span>$message</span><span>);
        }    
        
        </span><span>return</span> <span>$databases</span><span>;
    }
    
    </span><span>function</span> logs(<span>$file</span>, <span>$contents</span><span>) {
        </span><span>$dirname</span> = <span>dirname</span>(<span>$file</span><span>);
        </span><span>try</span><span> {
            </span><span>if</span>(!<span>is_dir</span>(<span>dirname</span>(<span>$file</span>)) || !<span>is_writeable</span>(<span>dirname</span>(<span>$file</span><span>))) {
                </span><span>throw</span> <span>new</span> <span>Exception</span>("file is not direcotory or file can't write"<span>);
            }
            </span><span>file_put_contents</span>(<span>$file</span>, <span>$contents</span>,<span> FILE_APPEND);
        }</span><span>catch</span>(<span>Exception</span> <span>$e</span><span>) {
            </span><span>$message</span> = <span>date</span>('Y-m-d H:i:s').<span>$e</span>->getLine.' '.<span>$e</span>->getMessage()."\r\n"<span>;
            logs(</span><span>$logfile</span>, <span>$message</span><span>);
        }
    }
    
    
    </span><span>//</span><span>获取当前目录下的文件（不包含子文件夹）</span>
    <span>function</span> get_dir_files(<span>$currPath</span>, &<span>$returnVal</span>=<span>array</span><span>()) {
        </span><span>if</span>(<span>is_dir</span>(<span>$currPath</span><span>)) {
            </span><span>$currPath</span> = (<span>substr</span>(<span>$currPath</span>,-1,1)=='/')?<span>substr</span>(<span>$currPath</span>,0,<span>strlen</span>(<span>$currPath</span>)-1):<span>$currPath</span><span>;

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

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