Migrating from PHP4 to PHP5

[bacon333]

I'm currently working at a startup company that have developed web applications with PHP4. A lot of work has been put into it and for the most part everything works.

Now, I was wondering what the advantages are from a programmers and business standpoint to migrate to PHP5. I know PHP5 is more OO but will that in anyway affect performance or costs? Or is it more of the programmer's preference?

 

[bacon333]

bump

 

[kamper]

Where do these apps get hosted? If they frequently end up on generic web hosts then you might possibly run into the problems of hosts that don't support php5 yet. But I have no idea what the reality would be there as I never look at it.