如何在php中回显行值?
请参阅上面的代码,如何回显行值?尝试:如何在php中回显行值?,php,mysqli,Php,Mysqli,请参阅上面的代码,如何回显行值?尝试: $stmt = $con->prepare('SELECT SUM(amount) AS value_sum FROM transactions WHERE id = "' . $_SESSION['id'] . '"'); $stmt->execute(); $result = $stmt->get_result(); $row = $result->fetch_object(); echo$row->value\u sum
$stmt = $con->prepare('SELECT SUM(amount) AS value_sum FROM transactions WHERE id = "' . $_SESSION['id'] . '"');
$stmt->execute();
$result = $stmt->get_result();
$row = $result->fetch_object();
echo$row->value\u sum
@johncode致命错误:未捕获错误:无法将stdClass类型的对象用作数组
警告:您完全可以使用参数化的预处理语句,而不是手动生成查询。它们由或提供。永远不要相信任何形式的输入!即使您的查询仅由受信任的用户执行。
$row = $result->fetch_object()->value_sum;
echo $row;