为什么fgetcsv在字符之间添加一些字符？

I use a php script with fgetcsv() to import data from csv files I did not create (no choice).

My problem is the data are imported to my database with a special character between each character, on each field...

For example, "Mounted print" is imported as "�M�o�u�n�t�e�d� �P�r�i�n�t�"

I tried to modify encoding with no result : utf8_encode/decode, iconv ...

Any idea ?

Thanks