


MySQL database backup function implemented by ThinkPHP framework
这篇文章主要介绍了ThinkPHP框架实现的MySQL数据库备份功能,结合实例形式分析了thinkPHP导出mysql数据库相关操作实现与使用技巧,需要的朋友可以参考下
本文实例讲述了ThinkPHP框架实现的MySQL数据库备份功能。分享给大家供大家参考,具体如下:
1、缘由
自从2010年开始试用ThinkPHP以来,的确带来了许多方便。的确给我带来了许多方便。此次应为数据频繁备份需要,而每次远程连接到服务器颇为不便。变萌生了写个ThinkPHP数据库备份SQL生成类的念头。
2、介绍
由于在数据库中有使用触发器。因此也需要一并备份。并且为了插入数据的时候不会受到触发器影响而破坏先前插入的数据,在插入数据之前生成了删除触发器的代码。 本类并不能生成数据表的创建和删除代码,因此在使用中请注意保证两端表结构的一致。
做WEB开发,一直以来,都采用 Navicat For Mysql 将本地数据库同步到服务器上。前些天,突然心血来潮,将本地数据库升级到了 Mysql 5.5版本,再次将数据同步的时候却发生了错误。想起之前写过的 ThinkPHP 实现Mysql数据库备份 只有备份数据的功能,而没有导出表结构的功能。于是想到了升级一下。让其更完整。
本次升级 增加了 备份表结构、视图功能。导出数据增加了类型判断,insert 语句当字段为空的时候会输出 NULL,当为数字 的时候则不会带上 单引号。
<?php /** * 描述:基于ThinkPHP框架的Mysql数据库导出类 * 日期:2012-07-15 * 作者:龚辟愚 */ class DBExport { /** * @description 获取当前数据库的所有表名。 * @static * @return array */ static protected function getTables() { $dbName=C('DB_NAME'); $result=M()->query("SHOW FULL TABLES FROM `{$dbName}` WHERE Table_Type = 'BASE TABLE'"); foreach ($result as $v){ $tbArray[]=$v['Tables_in_'.C('DB_NAME')]; } return $tbArray; } static protected function getViews() { $dbName=C('DB_NAME'); $result=M()->query("SHOW FULL TABLES FROM `{$dbName}` WHERE Table_Type = 'VIEW'"); foreach ($result as $v){ $tbArray[]=$v['Tables_in_'.C('DB_NAME')]; } return $tbArray; } /** * @description 导出SQL数据,但不包含表创建代码。 * @static * @return string */ static public function ExportAllData() { $tables = self::getTables(); $arrAll = array( "SET FOREIGN_KEY_CHECKS=0;", self::BuildAllTriggerDropSql(), self::BuildTableSql(), self::BuildViewSql() ); $tbl = new Model(); foreach($tables as $table) { $arrAll[]="\r\nDELETE FROM {$table};"; /* $rs = $tbl->query("SHOW COLUMNS FROM {$table}"); $arrFields = array(); foreach ($rs as $k=>&$v){ $arrFields[] = "`{$v['Field']}`"; } $sqlFields = implode($arrFields,","); */ $rs=$tbl->query("select * from `{$table}`"); foreach ($rs as $k=>&$v){ $arrValues = array(); foreach($v as $key=>$val) { if(is_numeric($val)){ $arrValues[]=$val; }else if(is_null($val)){ $arrValues[]='NULL'; }else{ $arrValues[]="'".addslashes($val)."'"; } } $arrAll[] = "INSERT INTO `{$table}` VALUES (".implode(',',$arrValues).");"; } } $arrAll[]=self::BuildTriggerCreateSql(); return implode("\r\n",$arrAll); } static protected function BuildTableSql() { $tables = self::getTables(); $arrAll = array(); foreach($tables as &$val){ $rs = M()->query("SHOW CREATE TABLE `{$val}`"); $tbSql = preg_replace("#CREATE(.*)\\s+TABLE#","CREATE TABLE",$rs[0]['Create Table']); $arrAll[] = "DROP TABLE IF EXISTS `{$rs[0]['Table']}`;\r\n{$tbSql};\r\n"; } return implode("\r\n",$arrAll); } static protected function BuildViewSql() { $views = self::getViews(); $arrAll = array(); foreach($views as &$val){ $rs = M()->query("SHOW CREATE VIEW `{$val}`"); $tbSql = preg_replace("#CREATE(.*)\\s+VIEW#","CREATE VIEW",$rs[0]['Create View']); $arrAll[] = "DROP VIEW IF EXISTS `{$rs[0]['View']}`;\r\n{$tbSql};\r\n"; } return implode("\r\n",$arrAll); } /** * @description 如果存在触发器,生成删除代码。原因是:插入数据的时候可能会受到触发器影响。 * @static * @return string */ static public function BuildAllTriggerDropSql() { $rs = M()->query("show triggers"); $arrAll = array(); foreach ($rs as $k=>&$v) { $arrSql = array( 'DROP TRIGGER IF EXISTS `',$v['Trigger'],'`;' ); $arrAll[] = implode('',$arrSql); } return implode("\r\n",$arrAll); } /** * @description 生成所有触发器的创建代码。 * @static * @return string */ static protected function BuildTriggerCreateSql() { $rs = M()->query("show triggers"); $arrAll = array(); foreach ($rs as $k=>&$v) { $arrSql = array( 'CREATE TRIGGER `',$v['Trigger'],'` ',$v['Timing'],' ',$v['Event'],' ON `', $v['Table'],'` FOR EACH ROW ',$v['Statement'],';' ); $arrAll[] = implode('',$arrSql); } return implode("\r\n",$arrAll); } }
调用示例:
vendor('DBExport',COMMON_PATH); header('Content-type: text/plain; charset=UTF-8'); $dbName = C('DB_NAME'); header("Content-Disposition: attachment; filename=\"{$dbName}.sql\""); echo DBExport::ExportAllData()
以上就是本篇文章的全部内容了,感谢大家阅读。更多请关注PHP中文网!
相关推荐:
tp框架(thinkPHP)实现三次登陆密码错误之后锁定账号功能
ThinkPHP框架实现导出excel数据的方法(基于PHPExcel)
The above is the detailed content of MySQL database backup function implemented by ThinkPHP framework. For more information, please follow other related articles on the PHP Chinese website!

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics



MySQL is an open source relational database management system, mainly used to store and retrieve data quickly and reliably. Its working principle includes client requests, query resolution, execution of queries and return results. Examples of usage include creating tables, inserting and querying data, and advanced features such as JOIN operations. Common errors involve SQL syntax, data types, and permissions, and optimization suggestions include the use of indexes, optimized queries, and partitioning of tables.

PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.

PHP remains important in modern web development, especially in content management and e-commerce platforms. 1) PHP has a rich ecosystem and strong framework support, such as Laravel and Symfony. 2) Performance optimization can be achieved through OPcache and Nginx. 3) PHP8.0 introduces JIT compiler to improve performance. 4) Cloud-native applications are deployed through Docker and Kubernetes to improve flexibility and scalability.

MySQL is chosen for its performance, reliability, ease of use, and community support. 1.MySQL provides efficient data storage and retrieval functions, supporting multiple data types and advanced query operations. 2. Adopt client-server architecture and multiple storage engines to support transaction and query optimization. 3. Easy to use, supports a variety of operating systems and programming languages. 4. Have strong community support and provide rich resources and solutions.

The reasons why PHP is the preferred technology stack for many websites include its ease of use, strong community support, and widespread use. 1) Easy to learn and use, suitable for beginners. 2) Have a huge developer community and rich resources. 3) Widely used in WordPress, Drupal and other platforms. 4) Integrate tightly with web servers to simplify development deployment.

PHP is a scripting language widely used on the server side, especially suitable for web development. 1.PHP can embed HTML, process HTTP requests and responses, and supports a variety of databases. 2.PHP is used to generate dynamic web content, process form data, access databases, etc., with strong community support and open source resources. 3. PHP is an interpreted language, and the execution process includes lexical analysis, grammatical analysis, compilation and execution. 4.PHP can be combined with MySQL for advanced applications such as user registration systems. 5. When debugging PHP, you can use functions such as error_reporting() and var_dump(). 6. Optimize PHP code to use caching mechanisms, optimize database queries and use built-in functions. 7

MySQL's position in databases and programming is very important. It is an open source relational database management system that is widely used in various application scenarios. 1) MySQL provides efficient data storage, organization and retrieval functions, supporting Web, mobile and enterprise-level systems. 2) It uses a client-server architecture, supports multiple storage engines and index optimization. 3) Basic usages include creating tables and inserting data, and advanced usages involve multi-table JOINs and complex queries. 4) Frequently asked questions such as SQL syntax errors and performance issues can be debugged through the EXPLAIN command and slow query log. 5) Performance optimization methods include rational use of indexes, optimized query and use of caches. Best practices include using transactions and PreparedStatemen

PHP is still dynamic and still occupies an important position in the field of modern programming. 1) PHP's simplicity and powerful community support make it widely used in web development; 2) Its flexibility and stability make it outstanding in handling web forms, database operations and file processing; 3) PHP is constantly evolving and optimizing, suitable for beginners and experienced developers.
