CSS - 层叠上下文（The stacking context）

备份 / 恢复数据库

exec — 执行一个外部程序（在 php 文件所在目录进行执行）

很久以前写的，很多方法是项目中的直接复制粘体用不了，只能提供下思路。

用到执行外部程序的就这一句：

exec("mysql -u$username -p$password $database < $backup_path$backup_name");

<?php
defined('BASEPATH') OR exit('No direct script access allowed');

class Database extends MY_Controller {
	private $backup_path;
	public function __construct(){
		parent::__construct();
		$this->backup_path = dirname($_SERVER['SCRIPT_FILENAME']).DIRECTORY_SEPARATOR.'db_backup'.DIRECTORY_SEPARATOR;
	}

	public function index(){
		$this->loadViewhf('back/database.html');
	}

	public function list_backup(){

		//打开文件夹
		$dir_handle = opendir($this->backup_path);
		//读取文件夹
		$backup_names = array();
		while(false !== $file = readdir($dir_handle)){
			if ($file == '.' || $file == '..') continue;
			// 创建每一行数据
			$table_row_map = (object)array(
				'backup_name' => $file,
				'backup_path' => '~/db_backup'
				);
			// 加入每一行数据到data
			$result['data'][] = $table_row_map;
		}
		//返回结果
        $this->returnResult($result);
	}

	public function backup(){

		// 选择备份路径（网站根目录下的db_backup文件夹）
		$backup_path = $this->backup_path;
		// 生成备份文件名
		$backup_name = date("Y-m-d_H-i-s").'_backup.sql';;
		// 进行备份
		$username = $this->db->username;
		$password = $this->db->password;
		$database = $this->db->database;
		exec("mysqldump -u$username -p$password $database > $backup_path$backup_name");
		// 返回结果
		$result['status'] = true;
		$this->returnResult($result);
	}

	public function del_backup(){
		// 备份文件名
		$backup_name = $this->input->post('backup_name', true);
		// 选择备份路径（网站根目录下的db_backup文件夹）
		$backup_path = $this->backup_path;
		// 删除
		if (unlink($backup_path.$backup_name)) {
			$result['status'] = true;
		}else{
			$result['status'] = false;
		}
		// 返回结果
		$this->returnResult($result);
	}

	public function recover_backup(){
		// 备份文件名
		$backup_name = $this->input->post('backup_name', true);
		// 选择备份路径（网站根目录下的db_backup文件夹）
		$backup_path = $this->backup_path;
		// 恢复备份
		$username = $this->db->username;
		$password = $this->db->password;
		$database = $this->db->database;
		exec("mysql -u$username -p$password $database < $backup_path$backup_name");
		// 返回结果
		$result['status'] = true;
		$this->returnResult($result);
	}

}