Recently BlueHost updated its PHP from 5.2 to 5.4 and all of a sudden 6 of my 10 WordPress based websites went down (white screen). The tech support told me that he will temporarily downgrade the PHP on my account back to 5.2, which fixed the problem.
But unfortunately they said in a few weeks everyone has to be running on 5.4.
My question is "What needs to be done on my end to ensure the WordPress websites continue running once we are upgraded to PHP 5.4 (or 5.5)?"
Any help will greatly be appreciated!