利用wamp来php连接mysql数据库

<?php
$servername = "localhost"; // MySQL服务器名称，默认为localhost
$username = "root"; // 连接数据库的用户名，默认为root
$password = ""; // 连接数据库的密码，默认为空
$dbname = "mydatabase"; // 要连接的数据库名称

// 创建连接
$conn = new mysqli($servername, $username, $password, $dbname);

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

echo "连接成功";
?>

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

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

$conn->close();