I run OpenX (an open source ad serving platform) under IIS and PHP …. but after upgrading to PHP 5.3 noticed the following error appearing in the PHP error logs file (c:\windows\temp\php-errors.log by default).
PHP Warning: date_default_timezone_get(): 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. … Read more “Running OpenX under IIS with PHP 5.3 – date_default_timezone_get errors”