The utf8 set in MySQL is not real UTF-8.
Use utf8mb4 character set instead of utf8.
妈妈再也不用担心写东西用不了 Emoji 了~
BREAKING CHANGE: Old databases and tables need to be upgraded.
Better not use old database structure with new connect parameters.
The web interface is merged but the table is not.
Merge it into a single SQL file, without execute PHP.
Redumped database structure with mysqldump command.
Users rarely use hack, but it is enabled by default.
They need to disable it manually, and there are also many people do not now why should disable it.
Make the hack function disabled when creating a new problem.
