This morning I used yum upgrade to upgrade from php 5.1.6 to 5.3+ I then went to one of my sites and found that it had crashed, error establishing database connection.
I found through this question install php on linux from 1and1 VPS that this is because centos5 is outdated, and I was offered the alternative of doing it using individual packages by MadHatter.
I have just tried that solution and then checked my php version, and it hadn't upgraded. I have just learned that this is because my server software is Virtuozzo/Plesk and that these have a version of php of their own, seperate to that of the live sites, it turns out that I was working on the server's version of php with Yum.
Is there any way I can change yum to work on my version of php, or any other suggestions. My phpinfo() is at http://www.spotblue.co.uk/phpinfo.php
I am tearing out my hair, so any help gratefully received.