Is there a way to pass a constant to the bind_param function in mysqli prepared statements? When I try to pass a variable, it works fine:
$stmt->bind_param("i", $id);
However, when I attempt to pass a constant, it does not work. For example:
$stmt->bind_param("i", ID);
This results in the following error:
Fatal error: Cannot pass parameter 2 by reference in...
Any advice on how to resolve this issue would be greatly appreciated. Thank you.
When working with MySQLi, it's important to note that the arguments following the type strings are passed by reference, not by value. This means you can only pass a variable by reference, allowing you to assign and reassign variables as needed before executing statements. For example:
$id = ID;
$stmt->bind_param("i", $id);
If this limitation is causing issues for you, consider using PDO's MySQL driver instead of MySQLi. With PDO, you have the option to bind a value instead of a variable to a query parameter, making it easier to work with prepared statements that will only be executed once.
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