PHP5中当在ini中指定错误级别为E_STRICT时，可能导致getdate出现如下错误：
getdate() [function.getdate]: It is not safe to rely on the system’s timezone settings. Please use the date.timezone setting, the TZ environment variable 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.
解决办法可以在 getdate() 前面加上：
date_default_timezone_set(‘时区名’);
时区名如：Asia/Hong_Kong，时区列表可以参看这里。
thank you!