Home Backend Development PHP Tutorial PHP实现把MySQL数据库导出为.sql文件实例(仿PHPMyadmin导出功能)_php实例

PHP实现把MySQL数据库导出为.sql文件实例(仿PHPMyadmin导出功能)_php实例

Jun 07, 2016 pm 05:20 PM
mysql database php

用php代码实现数据库备份可以使网站的管理变得非常便捷,我们可以直接进后台操作就能完成数据库的备份。

关键技术:

1. 首先要得到该数据库中有哪些表,所用函数 mysql_list_tables(),然后可以将获取的所有表名存到一个数组。
2. show create table 表名 可以获取表结构。
3. select * from 表名 取出所有记录,用循环拼接成 insert into... 语句。

实现代码:

复制代码 代码如下:


 header("Content-type:text/html;charset=utf-8");

 //配置信息
 $cfg_dbhost = 'localhost';
 $cfg_dbname = 'ftdm';
 $cfg_dbuser = 'root';
 $cfg_dbpwd = 'root';
 $cfg_db_language = 'utf8';
 $to_file_name = "ftdm.sql";
 // END 配置

 //链接数据库
 $link = mysql_connect($cfg_dbhost,$cfg_dbuser,$cfg_dbpwd);
 mysql_select_db($cfg_dbname);
 //选择编码
 mysql_query("set names ".$cfg_db_language);
 //数据库中有哪些表
 $tables = mysql_list_tables($cfg_dbname);
 //将这些表记录到一个数组
 $tabList = array();
 while($row = mysql_fetch_row($tables)){
  $tabList[] = $row[0];
 }

 echo "运行中,请耐心等待...
";
 $info = "-- ----------------------------\r\n";
 $info .= "-- 日期:".date("Y-m-d H:i:s",time())."\r\n";
 $info .= "-- 仅用于测试和学习,本程序不适合处理超大量数据\r\n";
 $info .= "-- ----------------------------\r\n\r\n";
 file_put_contents($to_file_name,$info,FILE_APPEND);

 //将每个表的表结构导出到文件
 foreach($tabList as $val){
  $sql = "show create table ".$val;
  $res = mysql_query($sql,$link);
  $row = mysql_fetch_array($res);
  $info = "-- ----------------------------\r\n";
  $info .= "-- Table structure for `".$val."`\r\n";
  $info .= "-- ----------------------------\r\n";
  $info .= "DROP TABLE IF EXISTS `".$val."`;\r\n";
  $sqlStr = $info.$row[1].";\r\n\r\n";
  //追加到文件
  file_put_contents($to_file_name,$sqlStr,FILE_APPEND);
  //释放资源
  mysql_free_result($res);
 }

 //将每个表的数据导出到文件
 foreach($tabList as $val){
  $sql = "select * from ".$val;
  $res = mysql_query($sql,$link);
  //如果表中没有数据,则继续下一张表
  if(mysql_num_rows($res)  //
  $info = "-- ----------------------------\r\n";
  $info .= "-- Records for `".$val."`\r\n";
  $info .= "-- ----------------------------\r\n";
  file_put_contents($to_file_name,$info,FILE_APPEND);
  //读取数据
  while($row = mysql_fetch_row($res)){
   $sqlStr = "INSERT INTO `".$val."` VALUES (";
   foreach($row as $zd){
    $sqlStr .= "'".$zd."', ";
   }
   //去掉最后一个逗号和空格
   $sqlStr = substr($sqlStr,0,strlen($sqlStr)-2);
   $sqlStr .= ");\r\n";
   file_put_contents($to_file_name,$sqlStr,FILE_APPEND);
  }
  //释放资源
  mysql_free_result($res);
  file_put_contents($to_file_name,"\r\n",FILE_APPEND);
 }

 echo "OK!";

?>

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian Dec 24, 2024 pm 04:42 PM

PHP 8.4 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati

How To Set Up Visual Studio Code (VS Code) for PHP Development How To Set Up Visual Studio Code (VS Code) for PHP Development Dec 20, 2024 am 11:31 AM

Visual Studio Code, also known as VS Code, is a free source code editor — or integrated development environment (IDE) — available for all major operating systems. With a large collection of extensions for many programming languages, VS Code can be c

7 PHP Functions I Regret I Didn't Know Before 7 PHP Functions I Regret I Didn't Know Before Nov 13, 2024 am 09:42 AM

If you are an experienced PHP developer, you might have the feeling that you’ve been there and done that already.You have developed a significant number of applications, debugged millions of lines of code, and tweaked a bunch of scripts to achieve op

How do you parse and process HTML/XML in PHP? How do you parse and process HTML/XML in PHP? Feb 07, 2025 am 11:57 AM

This tutorial demonstrates how to efficiently process XML documents using PHP. XML (eXtensible Markup Language) is a versatile text-based markup language designed for both human readability and machine parsing. It's commonly used for data storage an

Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Apr 05, 2025 am 12:04 AM

JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,

PHP Program to Count Vowels in a String PHP Program to Count Vowels in a String Feb 07, 2025 pm 12:12 PM

A string is a sequence of characters, including letters, numbers, and symbols. This tutorial will learn how to calculate the number of vowels in a given string in PHP using different methods. The vowels in English are a, e, i, o, u, and they can be uppercase or lowercase. What is a vowel? Vowels are alphabetic characters that represent a specific pronunciation. There are five vowels in English, including uppercase and lowercase: a, e, i, o, u Example 1 Input: String = "Tutorialspoint" Output: 6 explain The vowels in the string "Tutorialspoint" are u, o, i, a, o, i. There are 6 yuan in total

Explain late static binding in PHP (static::). Explain late static binding in PHP (static::). Apr 03, 2025 am 12:04 AM

Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.

What are PHP magic methods (__construct, __destruct, __call, __get, __set, etc.) and provide use cases? What are PHP magic methods (__construct, __destruct, __call, __get, __set, etc.) and provide use cases? Apr 03, 2025 am 12:03 AM

What are the magic methods of PHP? PHP's magic methods include: 1.\_\_construct, used to initialize objects; 2.\_\_destruct, used to clean up resources; 3.\_\_call, handle non-existent method calls; 4.\_\_get, implement dynamic attribute access; 5.\_\_set, implement dynamic attribute settings. These methods are automatically called in certain situations, improving code flexibility and efficiency.

See all articles