Hi @bsmither,
Have a look at the supported PHP versions page. At this point anything before PHP5.6 is unsupported and should be considered dangerous to run. Trying to get OJS 3.1+ to run on an unsupported PHP release, or staying with OJS 3.0.x, might buy you a little time – but not safely or satisfactorily, I suspect.
Is there a reason you’re looking to stay with an older PHP?
Regards,
Alec Smecher
Public Knowledge Project Team