There are lines, for example, "Fur" and "Fur".
If I check the data lines with mb_stripos (I also write mb_internal_encoding("UTF-8") ), I get false. If you put a space ("Fur") in front of the word to be checked, it returns true.
How to make the space is not needed? It’s simple, in my opinion, to insert a space in front of the line - this is a crutch of some kind.