UTF-8 Support in MySQL
If you want to save Unicode character into MySQL, make sure that the encoding is utf8mb4.
MySQL Documentation stated that:
The character set named utf8 uses a maximum of three bytes per character and contains only BMP characters. As of MySQL 5.5.3, the utf8mb4 character set uses a maximum of four bytes per character supports supplemental characters:
For a BMP character, utf8 and utf8mb4 have identical storage characteristics: same code values, same encoding, same length.
For a supplementary character, utf8 cannot store the character at all, while utf8mb4 requires four bytes to store it. Since utf8 cannot store the character at all, you do not have any supplementary characters in utf8 columns and you need not worry about converting characters or losing data when upgrading utf8 data from older versions of MySQL.