Mind you, I’m no PHP guru and I only have PHP installed on our server because of our WordPress blogs. that said, I was facing an ugly PHP error today and somehow we could not load the WordPress admin pages anymore of it. The error was:
PHP Warning: Module 'fileinfo' already loaded in Unknown on line 0
After searching for a solution I thought it would be best to update PHP along the way. Thus I found this nice description on Webtatic Blog which describes how to update to the latest PHP version on CentOS 5.x (since the default repro only brings you 5.1.6).
Low and behold, after updating to the latest PHP version, it will give you 5.3.1, the error was gone and WordPress Admin pages are back to normal.