Hey I wanna get in on some of this knowledge.

Server:
Operating system Linux 2.6.8-022stab070.9-enterprise
CPU AuthenticAMD, Dual Core AMD Opteron(tm) Processor 265

Running PHP 4.3.9 & Apache v2.0.52

I am curious about learning more on PHP 5 with ACP and why it would benfit my forum?

I was about to install eaccelerator but I'm pausing to learn more first.

What might I experince if I simply upgraded right this second to php5 with out knowing what I'm getting into? IE what problems might I encounter with compadiblity with vbulletin.

Are there changes that need to be made?

I should mention that I noticed in an above post, the statement about PLESk, I used to use CPANEL but for some reaosn I thought plesk would be great this time around. 2 weeks in and I'm wondering if it was wise.

Personally, I would avoid php 5 atm - upgrade to 4.4.2 and install APC, not eaccelerator.

We use plesk (7.5.4) and it doesn't seem to be any worse than cpanel.

4.3.9 has security flaws...at least upgrade to 4.4.2.

Also, there is no problems between PHP 4/5 on vBulletin. The PHP devs did extremely well when they released PHP 5 as to not break functionality. 99% of scripts work out of the box from PHP 4 to PHP 5.

Paul M: Why wouldn't you recommend PHP 5.1? PHP 5 sucks, but PHP 5.1 works wonderfully. I've used it on production sites for quite a while with no problems.

Ew, Plesk.