PHP与Node.js连接MySQL的方法及示例

<?php

$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDatabase";

// 创建一个新的PDO实例以建立到mysql服务器的连接。
$conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);

// 设置错误模式为异常以便于捕获错误
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

try {
// 执行SQL查询语句并获取结果集
$stmt = $conn->prepare('SELECT * FROM myTable');
$stmt->execute();

// 获取所有行作为关联数组
$result = $stmt->fetchAll(PDO::FETCH_ASSOC);
} catch (PDOException $e) {
echo 'Connection failed: ' . $e->getMessage();
}

// 在完成数据的操作之后关闭数据库连接
$conn = null;

?>

var mysql = require('mysql');

var connection = mysql.createConnection({
host : 'localhost',
user : 'username',
password : 'password',
database : 'myDatabase'
});

connection.connect(function(err) {
if (err) throw err;

var sqlQuery = 'SELECT * FROM myTable';

connection.query(sqlQuery, function (error, results, fields) {
if(error){
console.error('Error executing query', error);
} else{
console.log(results);

// 处理完业务逻辑后记得断开数据库链接
}

// 关闭数据库连接
connection.end();
});
});