本教学使用环境介绍伺服器端：Ubuntu 18.04 LTS资料库：Mariadb 10.1.34（Mysql）语言版本：php 7.3本机端：MacOS High Sierra本教学将使用纯 php 去备份资料库并下载到目录底下$ crontab -e设定每天凌晨00:00 执行0 0 * * * php /var/www/backup.phpbackup.php 脚本记得开头一定要 「<?php」，即便你有启用缩写header(‘Content-Type: text/html; charset=utf-8’);function backup_mysql_database($options){$mtables = array(); $contents = “– Database: ".$options['db_to_backup']." –\n”;$mysqli = new mysqli($options[‘db_host’], $options[‘db_uname’], $options[‘db_password’], $options[‘db_to_backup’]);if ($mysqli->connect_error) { die(‘Error : (’. $mysqli->connect_errno .’) ‘. $mysqli->connect_error);}$mysqli->query(“SET NAMES utf8”);$mysqli->set_charset(“utf8mb4”);$results = $mysqli->query(“SHOW TABLES”);while ($row = $results->fetch_array()){ if (!in_array($row[0], $options[‘db_exclude_tables’])){ $mtables[] = $row[0]; }}foreach($mtables as $table){ $contents .= “– Table ".$table." –\n”; $results = $mysqli->query(“SHOW CREATE TABLE “.$table); while ($row = $results->fetch_array()){ $contents .= $row[1].”;\n\n”; } $results = $mysqli->query(“SELECT * FROM “.$table); $row_count = $results->num_rows; $fields = $results->fetch_fields(); $fields_count = count($fields); $insert_head = “INSERT INTO ".$table." (”; for($i=0; $i < $fields_count; $i++){ $insert_head .= “".$fields[$i]->name."”; if($i < $fields_count-1){ $insert_head .= ‘, ‘; } } $insert_head .= “)”; $insert_head .= " VALUES\n”; if($row_count>0){ $r = 0; while ($row = $results->fetch_array()){ if(($r % 400) == 0){ $contents .= $insert_head; } $contents .= “(”; for($i=0; $i < $fields_count; $i++){ $row_content = str_replace("\n”,"\n",$mysqli->real_escape_string($row[$i])); switch($fields[$i]->type){ case 8: case 3: $contents .= $row_content; break; default: $contents .= “’”. $row_content ."’"; } if($i < $fields_count-1){ $contents .= ‘, ‘; } } if(($r+1) == $row_count || ($r % 400) == 399){ $contents .= “);\n\n”; } else { $contents .= “),\n”; } $r++; } }}if (!is_dir ( $options[‘db_backup_path’] )) { mkdir ( $options[‘db_backup_path’], 0777, true ); }## 备份后的 sql 名称$backup_file_name = “dev-” . date( “Y-m-d H:i:s”).".sql";$fp = fopen($options[‘db_backup_path’] . ‘/’ . $backup_file_name ,‘w+’);if (($result = fwrite($fp, $contents))) { // echo “Backup file created ‘$backup_file_name’ ($result)”;}fclose($fp);return $backup_file_name;}## 资料库设定$options = array( ‘db_host’=> ’localhost’, ‘db_uname’ => ‘root’, // 资料库使用者帐号 ‘db_password’ => ‘password’, // 资料库密码 ‘db_to_backup’ => ‘db’, // 资料库名称 ‘db_backup_path’ => ‘/var/www/’, // 保存到哪个路径 ‘db_exclude_tables’ => array());$backup_file_name=backup_mysql_database($options);这样就可以透过 php 备份到该主机下，直接产生 sql 档了。Line ID：ianmacQQ：1258554508
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