Can php detect 4-byte encoded utf8 chars?

Can php detect 4-byte encoded utf8 chars?

php utf8mb4

php

Can I safely use a utf8mb4 connection with utf8 columns?

php mysql pdo utf-8 utf8mb4

php

iPhone emoticons insert into MySQL but become blank value

php iphone mysql utf8mb4

php

The ultimate emoji encoding scheme

php mysql json utf-8 utf8mb4

php

Emoji on MySQL and PHP: why some symbol yes other not?

php mysql emoji utf8mb4

php