/** * Check if date is yesterday * * @access public * @param object ilDateTime DateTime object to check * @return bool * @static */ public static function isYesterday(ilDateTime $date) { global $ilUser; if (!is_object(self::$yesterday)) { self::$yesterday = new ilDateTime(time(), IL_CAL_UNIX, $ilUser->getTimeZone()); self::$yesterday->increment(IL_CAL_DAY, -1); } return ilDateTime::_equals(self::$yesterday, $date, IL_CAL_DAY, $ilUser->getTimeZone()); }