Detailed steps to implement MySQL read-write separation in PHP

In today's Internet application development, data access speed and stability are crucial. In order to improve database performance, many developers choose to implement MySQL read and write separation. PHP, as a popular back-end programming language, can efficiently interact with the MySQL database. This article will introduce in detail how to implement MySQL read and write separation in a PHP project and provide specific code examples.

1. What is MySQL read-write separation?

MySQL read-write separation is a database optimization technology. By allocating the read operations and write operations of the database to different servers, it can effectively Share the reading and writing pressure of the database and improve the overall performance of the system. Typically, write operations are concentrated on the master database, while read operations are distributed to multiple slave databases or cache servers.

2. Steps to implement MySQL read-write separation

Step 1: Configure master-slave replication

First, you need to configure master-slave replication in the MySQL database. This enables write operations on the master database and synchronization of data to the slave database. Please refer to the MySQL official documentation for specific configuration steps.

Step 2: Write PHP code

Next, we will write PHP code to achieve MySQL read and write separation. First, we need to create a database connection class to connect to the master-slave database.

class DB {
    private static $readDB;
    private static $writeDB;

    public static function connectReadDB() {
        if (!isset(self::$readDB)) {
            self::$readDB = new mysqli('read_db_host', 'username', 'password', 'database');
            if (self::$readDB->connect_error) {
                die("Connect failed: " . self::$readDB->connect_error);
            }
        }
        return self::$readDB;
    }

    public static function connectWriteDB() {
        if (!isset(self::$writeDB)) {
            self::$writeDB = new mysqli('write_db_host', 'username', 'password', 'database');
            if (self::$writeDB->connect_error) {
                die("Connect failed: " . self::$writeDB->connect_error);
            }
        }
        return self::$writeDB;
    }
}

Step 3: Implementation of read-write separation

Next, we can use this database connection class in specific business code to achieve read-write separation. For example, when a write operation is required, we connect to the master database; and when a read operation is required, we connect to the slave database.

$db = DB::connectWriteDB();
$result = $db->query("INSERT INTO users (name, email) VALUES ('John Doe', 'john@example.com')");
if ($result) {
    echo "Data inserted successfully into master database.";
}

$db = DB::connectReadDB();
$result = $db->query("SELECT * FROM users");
while ($row = $result->fetch_assoc()) {
    echo "Name: " . $row['name'] . ", Email: " . $row['email'] . "<br>";
}

Through the above code examples, we successfully implemented MySQL read and write separation in the PHP project. By connecting read and write operations to the master-slave database respectively, database performance and stability can be effectively improved.

3. Summary

This article details how to implement MySQL read-write separation in a PHP project, including configuring master-slave replication, writing database connection classes, and specific code examples to implement read-write separation. By properly distributing read and write operations, we can optimize database performance and improve the overall response speed of the system. I hope this article can help you achieve MySQL read-write separation during the development of PHP projects.

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