How to clean up a string after extracting it from the cells of a file using PHPExcel?

Question

PHP

I extract text data from a php file using PHPExcel. Through var_dump(), you can see that in addition to the string, some other invisible characters are coming. Because of this, the comparison on the switch statement does not work correctly, and there is no need to shove extra characters into the database. Who cleans lines from Excel?
For example, what gives var_dump: ["exclusive"]=> string(29) "New exclusive".
I tried to play with the encoding, but it did not help either.