an older php port

[jdyke]

I've been using php5 for a while and recently have upgraded via ports, which is 
5.05, which has a new 'feature' where it throws a fatal error is you use a 
function like
array_shift(explode('/',$str));
it throws "Fatal error: Only variables can be passed by reference".  I 
understand why, but the fix is timely through all the code we have.

This was only introduced in php5.05.  how can i install the older port 5.04 or 
5.02, where this did not occur in the base php code.

Thanks
Jeff