mysql 获取影响的行数

$mysqli = new mysqli("localhost", "username", "password", "database");

if ($mysqli->connect_error) {
    die("连接失败: " . $mysqli->connect_error);
}

$sql = "UPDATE users SET status = 'active' WHERE id = 1";
$result = $mysqli->query($sql);

if ($result) {
    $affected_rows = $mysqli->affected_rows;
    echo "影响的行数: " . $affected_rows;
} else {
    echo "执行失败: " . $mysqli->error;
}

$mysqli->close();

try {
    $pdo = new PDO("mysql:host=localhost;dbname=database", "username", "password");
    $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

    $sql = "UPDATE users SET status = 'active' WHERE id = 1";
    $affected_rows = $pdo->exec($sql);

    echo "影响的行数: " . $affected_rows;
} catch (PDOException $e) {
    echo "执行失败: " . $e->getMessage();
}