WordPress – Script(PHP) to convert MySQL collation from utf8mb4 to utf8

If your MYSQL database import fails with Unknown collation: ‘utf8mb4_unicode_ci’ after the latest WordPress update 4.2.2, chances are that you are running a MYSQL server version 5.5.2 or below. With the most recent update, WordPress changed their encoding standard from utf8 to utf8mb4, which is only supported starting with MYSQL server version 5.5.3. This can[…]