Mysql read-write separation operation implemented by PHP
This article mainly introduces the mysql read-write separation operation implemented by PHP, briefly describes the principle of mysql read-write separation, and combines examples to provide relevant implementation techniques for PHP to operate different databases with mysql read-write sql statements. , Friends who need it can refer to
The example in this article describes the mysql read-write separation operation implemented by PHP. Share it with everyone for your reference, the details are as follows:
First of all, the mysql master and slave need to be configured. The basic principle is to determine whether the sql statement is select. If so, go to the master library, otherwise check from the slave
<?php
/**
* mysql读写分离
*/
class db{
public function __construct($sql){
$chestr = strtolower(trim($sql));
//判断sql语句有select关键字的话，就连接读的数据库,否则就连接写数据库
if(substr($chestr,0,6)=='select')
{
echo 'I am using slave db..<br>';
$link = mysql_connect("192.168.20.201:3306", "open", "123456") or die("Could not connect: " . mysql_error());
mysql_select_db("hadoop");
$result = mysql_query($sql);
while($row = mysql_fetch_array($result,MYSQL_ASSOC)){
$data[]=$row;
}
//print_r($data);exit;
echo mysql_get_host_info($link).mysql_get_server_info($link).mysql_get_proto_info($link).mysql_get_client_info().'<br>';
}else{
echo 'I am using master db..<br>';
$link = mysql_connect("192.168.20.195:3306","open","123456") or die("Could not connect: " . mysql_error());
mysql_select_db("hadoop");
$result = mysql_query($sql);
//echo @mysql_affected_rows($result);
echo mysql_get_host_info($link).mysql_get_server_info($link).mysql_get_proto_info($link).mysql_get_client_info().'<br>';
}
}
}
$master = new db("INSERT INTO user (id,name)VALUES (NULL,'100')");
$slave = new db("SELECT * from `user`");Result:
I am using master db.. 192.168.20.195 via TCP/IP5.1.73-log10mysqlnd 5.0.8-dev - 20102224 - $Id: 731e5b87ba42146a687c29995d2dfd8b4e40b325 $ I am using slave db.. 192.168.20.201 via TCP/IP5.1.73-log10mysqlnd 5.0.8-dev - 20102224 - $Id: 731e5b87ba42146a687c29995d2dfd8b4e40b325 $
Related recommendations:
MySQL database backup function implemented by ThinkPHP framework
The above is the detailed content of Mysql read-write separation operation implemented by PHP. 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
1379
52
The Future of PHP: Adaptations and Innovations
Apr 11, 2025 am 12:01 AM
The future of PHP will be achieved by adapting to new technology trends and introducing innovative features: 1) Adapting to cloud computing, containerization and microservice architectures, supporting Docker and Kubernetes; 2) introducing JIT compilers and enumeration types to improve performance and data processing efficiency; 3) Continuously optimize performance and promote best practices.
How to open phpmyadmin
Apr 10, 2025 pm 10:51 PM
You can open phpMyAdmin through the following steps: 1. Log in to the website control panel; 2. Find and click the phpMyAdmin icon; 3. Enter MySQL credentials; 4. Click "Login".
PHP vs. Python: Understanding the Differences
Apr 11, 2025 am 12:15 AM
PHP and Python each have their own advantages, and the choice should be based on project requirements. 1.PHP is suitable for web development, with simple syntax and high execution efficiency. 2. Python is suitable for data science and machine learning, with concise syntax and rich libraries.
MySQL: An Introduction to the World's Most Popular Database
Apr 12, 2025 am 12:18 AM
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.
Why Use MySQL? Benefits and Advantages
Apr 12, 2025 am 12:17 AM
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.
How to use single threaded redis
Apr 10, 2025 pm 07:12 PM
Redis uses a single threaded architecture to provide high performance, simplicity, and consistency. It utilizes I/O multiplexing, event loops, non-blocking I/O, and shared memory to improve concurrency, but with limitations of concurrency limitations, single point of failure, and unsuitable for write-intensive workloads.
PHP's Current Status: A Look at Web Development Trends
Apr 13, 2025 am 12:20 AM
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.
PHP: Is It Dying or Simply Adapting?
Apr 11, 2025 am 12:13 AM
PHP is not dying, but constantly adapting and evolving. 1) PHP has undergone multiple version iterations since 1994 to adapt to new technology trends. 2) It is currently widely used in e-commerce, content management systems and other fields. 3) PHP8 introduces JIT compiler and other functions to improve performance and modernization. 4) Use OPcache and follow PSR-12 standards to optimize performance and code quality.
