需要为php脚本使用MySQL数据库

<?php
$servername = "localhost";
$username = "your_username";
$password = "your_password";
$dbname = "mydatabase";

// 创建数据库连接
$conn = new mysqli($servername, $username, $password);

// 检查连接是否成功
if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

// 创建数据库
$sql = "CREATE DATABASE $dbname";
if ($conn->query($sql) === TRUE) {
    echo "数据库创建成功";
} else {
    echo "数据库创建失败: " . $conn->error;
}

// 选择数据库
$conn->select_db($dbname);

// 创建表
$sql = "CREATE TABLE users (
    id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(30) NOT NULL,
    email VARCHAR(50) NOT NULL
)";
if ($conn->query($sql) === TRUE) {
    echo "表创建成功";
} else {
    echo "表创建失败: " . $conn->error;
}

// 关闭数据库连接
$conn->close();
?>

$sql = "INSERT INTO users (name, email) VALUES ('John Doe', 'john@example.com')";
if ($conn->query($sql) === TRUE) {
    echo "数据插入成功";
} else {
    echo "数据插入失败: " . $conn->error;
}

$sql = "UPDATE users SET email='johndoe@example.com' WHERE id=1";
if ($conn->query($sql) === TRUE) {
    echo "数据更新成功";
} else {
    echo "数据更新失败: " . $conn->error;
}

$sql = "DELETE FROM users WHERE id=1";
if ($conn->query($sql) === TRUE) {
    echo "数据删除成功";
} else {
    echo "数据删除失败: " . $conn->error;
}

$sql = "SELECT * FROM users";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    while ($row = $result->fetch_assoc()) {
        echo "ID: " . $row["id"] . " - Name: " . $row["name"] . " - Email: " . $row["email"] . "<br>";
    }
} else {
    echo "没有数据";
}

$conn->close();