PHP bind_params with null

Question

I am trying to bind params to a INSERT INTO MySQLi prepared statement if that variable exists, otherwise insert null.

This is what I have, but it is not working:

Answer 1

Keep in mind that you can't use bind_param twice, because the last statement will replace the first. Try to find a way to use bind_param just once.

Answer 2

bind_param works by reference. That means that it takes a variable, then uses the value of that variable in execute.

null is not a variable.

Try setting a variable to null and then binding that variable instead.

(Also consider using PDO instead of mysqli, where the execute method can take a simple array and you can bypass wacky binding methodology of mysqli.)