如何使用bind（）使用bind_param删除mysql行？

How to drop mysql row using bind_param with now() ?

<?PHP
session_start();
include("connect.php");
$stmt = $db_mysqli->prepare("DELETE FROM transfer_check WHERE delete_date_time < ?");
$stmt->bind_param("s", now());
$stmt->execute();
?>

I tried to use this my code but not work (it's not drop any row) how can i do ?

I understand NOW() is SQL, and you want to use php so you should be able to use:

$stmt->bind_param("s", (new \DateTime())->format('Y-m-d H:i:s'));

Just change your query to:

$stmt = $db_mysqli->prepare("DELETE FROM transfer_check WHERE delete_date_time < NOW()");

then you won't need a bind_param at all.