xls - mime-type definition

Question

PHP

There is some form of .xls file upload. I check the file type using the finfo_file() function.
So, the problem is this.
If you upload xls files made in microsoft office, then the function perfectly determines the file type: application/vnd.ms-excel .
If you load xls - made through LibreOffice, then the function defines the file as: application/vnd.ms-office
openOffice - not tested.
What to do in this situation? Or to hammer, and skip application/vnd.ms-office ?

Answer 1

You can additionally check for validity through PHPExcel