Set MySQL's timezone to GMT or do PHP & MySQL disagree on timezone?

[JAB Creations]

I'm currently trying to have set my database to record everything as GMT time and then convert it to other time zones through PHP. The problem is that PHP and MySQL seem to disagree by an hour of time about what time it really is. In MySQL to get it to match I have to do the following...

date_default_timezone_set('Europe/London');
$query = "SET time_zone = '+1:00';"

Also wouldn't GMT be +0:00? Is London time not GMT? I'd really appreciate some clarification. :)

- John

[whoisgregg]

British Summer Time starts the last Sunday in March and ends the last Sunday in October, at 1 am Greenwich Mean Time. The rest of the year they are on GMT.

Instead of using London time, just use GMT (from the manual [php.net]):

date_default_timezone_set('GMT');