php调用数据库内容

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

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

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

$sql = "SELECT id, name FROM users";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    // 输出数据
    while($row = $result->fetch_assoc()) {
        echo "id: " . $row["id"]. " - Name: " . $row["name"]. "<br>";
    }
} else {
    echo "0 结果";
}
$conn->close();
?>

<?php
$dsn = 'mysql:host=localhost;dbname=myDB';
$username = 'username';
$password = 'password';

try {
    $pdo = new PDO($dsn, $username, $password);
    $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

    $stmt = $pdo->query('SELECT id, name FROM users');
    $results = $stmt->fetchAll(PDO::FETCH_ASSOC);

    foreach ($results as $row) {
        echo "ID: " . $row['id'] . " - Name: " . $row['name'] . "<br>";
    }
} catch (PDOException $e) {
    echo "数据库连接失败: " . $e->getMessage();
}
?>