PHP application database encoding conversion (such as GBK to UTF-8 or UTF-8 to GBK) Considerations

1. If only the database is converted and the ApplicationProgramSet names should be modified to maintain the original encoding;

2. serialized fields stored in the database. If the application code changes after direct conversion through encoding, it will become invalid because the length of Multi-byte characters is inconsistent, therefore, when executing this type of conversion, it is best to read the array through the PHP script and then write the iconv or mb_convert_encoding to the new database;

3. to be supplemented.