Emoji expressions cannot be inserted into MySQL _ MySQL

Emoji expressions can not insert MySQL IOS end data through PHP passthrough to the background C ++, on the PHP system will automatically transcode Unicode into a UTF-8.
UTF-8-encoded emoji expressions cannot be inserted into MySQL.

After analysis, it is found that emoji expression is Unicode6.1 introduced, into the UTF-8 for four bytes of encoding, rather than like Chinese characters, the UTF-8 is 3 bytes. In MySQL, if you select the storage mode for the longext field storage is unable to process the four-byte UTF-8 encoding, only utf8mb4 encoding mode supports 4-byte UTF-8 encoding. So select utf8mb4 encoding method, mysql can store 4 bytes of UTF-8 encoding, so as to store emoji expressions. MySQL must be upgraded to version 5.5.

But the encoding stored in MySql although the back shell to store 4 bytes of UTF-8 encoding, but can not be successfully displayed, because the stored is garbled. So you need to convert the UTF-8 to Unicode and then save it to MySQL.