执行mysqli语句后如何获得行数？

Question

我想在会话变量中存储返回语句的行数，但是我不知道如何。我正在尝试这样做，但是没有用。

$stmt = $con->prepare("SELECT model, type, color FROM item WHERE model LIKE '%$type%'");


$stmt->execute();


$_SESSION['numRows'] = $stmt->num_rows;
echo $_SESSION['numRows'];

$result = $stmt->get_result();

$_SESSION['itemsInfo'] = $result->fetch_all();

Answer 1

我已经解决了问题，它的工作原理如下：

$stmt = $con->prepare("SELECT model, type, color FROM item WHERE model LIKE '%$type%'");


$stmt->execute();

$result = $stmt->get_result();

$_SESSION['itemsInfo'] = $result->fetch_all();
$_SESSION['numRows'] = count($_SESSION['itemsInfo']);
echo $_SESSION['numRows'];