Character limit in AS3 string

Hi,

Does anyone know what the character limit for a string in AS3 is? I’m generating a rather large XML string in a flash app which I’m sending to a php script to parse and save to a DB. I was stepping through the code and it looks like after a certain period that my XML string is going to blank. I’m assuming that this is because it’s going over a limit. I don’t really want to change my design but I suppose I’m going to have to if this won’t work.

I googled around on this but couldn’t find a definitive answer so any help would be appreciated.

Thanks,
Dermot