How to compare strings case sensitive?

Question

PHP

Let's say there are two variables whose values ​​are "Grisha" and "grishA". When compared using "==" they are equal.
How to compare? And how to find such a string in the database with the exact case of letters?
ps In Google, I don’t know what query to search through.

Answer 1

php.net/strcmp
>И как найти в базе такую строку с точным регистром букв?
Для этого в базе должна быть кодировка которая учитывает регистр букв (cs, а не ci)

Answer 2

ps In Google, I don’t know what query to search through.

let me help you

Answer 3

open the description of the rtf format (it is light) and parse it with handles in any language