PHP 连接MySQL
连接MySQL
在我们访问MySQL数据库前,我们需要先连接到数据库服务器:
实例(MySQLi - 面向对象)
<?php $servername = "localhost"; $username = "username"; $password = "password"; // 创建连接 $conn = new mysqli($servername, $username, $password); // 检测连接 if ($conn->connect_error) { die("连接失败: " . $conn->connect_error); } echo "连接成功"; ?>
实例(PDO)
<?php $servername = "localhost"; $username = "username"; $password = "password"; try { $conn = new PDO("mysql:host=$servername;", $username, $password); echo "连接成功"; } catch(PDOException $e) { echo $e->getMessage(); } ?>
关闭连接:
实例(MySQLi - 面向对象)
$conn->close();
实例(PDO)
$ conn = null;