SQLSTATE[HY000]: General error: 1366 Incorrect string value: '\xF0\x9F\x98\x84' for column 'content'-CSDN博客
php - Inserting UTF-8 encoded string into UTF-8 encoded mysql table fails with "Incorrect string value" - Stack Overflow
Upgrade error from 3.1.2.1 to 3.3.0-6 / A database error has occurred: SQLSTATE[HY000]: General error: 1366 Incorrect string value - Software Support - PKP Community Forum