can anyone help with this? ive suddenly started seeing this error on one of my sites, the site uses .php extentions but does not contain any php code. thanks
Seems apache did not find the path where it stores the session files. You should check the apache config file and make sure it points to the correct folder.
I had the same for a while, for got how I fixed it but it's a common bug: http://www.google.co.uk/search?q="Failed+to+write+session+data"+php+bug I vaguely remember having to explicitly start the session or set some variable you'd expect that was started automatically under normal circumstances. Anyway, browse around and you'll find the solution.