I am now researing for a couple of hours and can not get any solution... on my local webserver everything works fine. But on the live server it does not work. The website is 1:1 the same.
My Problem is: if a user is logged in and wants to edit his profile, he will get a dropdownlist of all the timezones, so he can select his preferred timezone. The default select item should be blank but instead there is as follow:
<option value="JOPTION_USE_DEFAULT">- Use Default -</option>
on my local server is looks as follow:
<option value=>- Use Default -</option>
The problem with that is, that it will store JOPTION_USE_DEFAULT into my database on the live server (on my local server it works perfectly). When you will go back to yoour profile, Joomla wants to convert JOPTION_USE_DEFAULT back to a timezone, which of course does not exist... so I will get an error page.
I saw that there is no default timezone set on the live server in the php.ini, but I do not have access to the php.ini file, so I tried with a .htaccess solution, which di not make any difference: php_value date.timezone "Europe/Zurich".