Inserting NULL values into MySQL from Codeigniter[SOLVED]

[eluser]jedd[/eluser]
[quote author="comex" date="1259365383"]
What I've been trying to do is to insert the value NULL into INT fields in MySQL(mysqli driver) but I end up with the value 0 inserted instead. I'm using Codeigniters active record class.
[/quote]

mysqli? {raises eyebrow}

Show us the CI AR code that you're using - it's much easier for us to work out what's going on when we see what's going on.

Inserting NULL directly to MySQL works, so the problem seems to be with how PHP interacts with MySQL.

Code?

Schema, as suggested, would be handy - you can tell straight away from a DESCRIBE tablename; whether NULL is allowed in that column.