Thank you for spliting the thread and bringing the migration issue to the table.
I do agree making all the scripts PHP5 compatible is the best solution, but will have to rewrite and rehack applications to make customs sessions work properly, just because of object oriented stracture has been redefined.
Thus destructors can use sessions but session handler can't use objects. In prior versions, they were called in the opposite order.
When I sarted scripting PHP4 3 years ago the PHP project did not stress that one should do PHP5 which I find a bit iresposible for the consortium.
The custom Zend sessions I installed where written in PHP4.
Granted at the end of the day resposibility is my to follow the appropriate development path.
I tried to look for a rewritten Zend custom sessions for PHP5 but could not find one. Asked Zend for support got none.
I looked at object oriented classes, even coded an original routine for php.net, yes I can figure out how to rewrite the Zend custom sessions to make it PHP5 workable.
But will require time, as well as will have to rehack phpBB as well.
I am a coder by heart, and been coding on and off since 1985 in FORTRAN.
But because of the new age economy I am forced to wear many hats at the same time.
I have to be an SEO, Webmaster, developer, business consultant to my company, and many other things, which are not pertinent to this discussion.
In the business world it is all about prioratizing, it is reality not pure coding practisses in a vacuum.
In Cuba they still drive 1950s chevrolets and cadilacs.
If you need to make things work you do, that is why we call it "Hacking!"
I am going to try to get the coding for my projects outsourced to have it done properly, but will need to find budgets for each project.
So, will have one foot in PHP4 and one in PHP5 as things evolve.
I think I am defining yet another job title here for myself, project planer..:)
Okay, now back to chicken and the egg story.
Under Cpanel are all the GNU software scripts PHP5 compatible? It will be a nightmare for hosting companies, if after the migration customer are not able to run WorPress, phpBB, Agora, Drupal, etc instalations!