php操作数据库教程视频

<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDB";

try {
    $conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
    // 设置PDO错误模式为异常
    $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    echo "连接成功";
    
    // 插入数据
    $stmt = $conn->prepare("INSERT INTO users (name, email) VALUES (:name, :email)");
    $stmt->bindParam(':name', $name);
    $stmt->bindParam(':email', $email);
    $name = "John Doe";
    $email = "john@example.com";
    $stmt->execute();
    
    // 查询数据
    $stmt = $conn->query("SELECT * FROM users");
    while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) {
        echo "ID: " . $row['id'] . " - Name: " . $row['name'] . " - Email: " . $row['email'] . "<br>";
    }
} catch(PDOException $e) {
    echo "连接失败: " . $e->getMessage();
}
$conn = null;
?>