How to find character code in PHP?

Question

PHP

I need to get the code of the letter AND
In UTF-16 it will be 041B (u0418) and in UTF-8 it will be 1048 if I am not confusing anything.
What PHP function to use to enter a Russian letter and get a character code in response?

Answer 1

print bin2hex("И");
d098

print bin2hex(mb_convert_encoding("И", 'UCS-2', 'UTF-8'));
0418