[lug] updating php on apache

[D. Stimits]

I was wanting to use some png generation functionality not available in 
my current php 4.1.2-7.3.6 on RH/KRUD 7.3 with apache 1.3.27-4. 
Apparently I can patch, or update to PHP 4.3+. Can anyone tell me what 
will break, or how cleanly and upgrade to php 4.3 will be from php 4.1? 
I'm trying to avoid anything that would leave the server inoperable for 
very long.

D. Stimits, stimits AT comcast DOT net