I've noticed the recent update to PHP has introduced an issue with the date() function. I'm now getting timezone warnings in the logs when using the date() function.
PHP Warning: date() [<a href='function.date'>function.date</a>]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/London' for 'BST/1.0/DST' instead in
I've read somewhere online that you need to set the date.timezone directive the php.ini.
Now since the update which was yesterday, I haven't rebooted the server. So is the date.timezone directive already set and it is a case of rebooting, or do I have to set the value myself, and if so can it be set in a global php.ini file (server wide) or will it have to be set on per domain basis?