Prepared Statement: Number of variables doesn't match number of parameters in prepared statement

Question

I know this question has been asked several times before but I don\'t see any problem with my code and yet I still get this error On my code which doesn\'t make sense at all.

Answer 1

You try to bind 2 parameters to a query that does not have any parameters:

$stmt = $db_conx->prepare("SELECT id, product_name FROM yt ORDER by id");
$stmt->bind_param("is", $id, $product_name);

You can only bind parameters if you define placeholders for them like this:

$stmt = $db_conx->prepare("SELECT id, product_name FROM where id = ? or  product_name = ?");
$stmt->bind_param("is", $id, $product_name);

The ? denotes placeholders you can bind parameters to.