[zylstra]

Originally Posted by mfyvie

Of course we all know that NULL and 0 are two very different concepts and are not equal, therefore this statement should read true. Unfortunately it is false. This means if you start with a null value and try to write 0, it simply won't work and you'll be wondering why your value doesn't get written to the session table.

For this reason I've chosen to make the default value 0, and the "true / false" states 1 and -1 respectively. You may want to verify your results by looking into your session table and/or writing out log entries to make sure that everything is working the way you expect it to.

No need to use 1 and -1. Simply use

PHP Code:

(NULL!==0) 


for your conditional.