How to set MIME type of application/vnd.apple.pkpass in order to share pass by link or email

Question

I just created an app and a pass, so I can add the pass to the PassBook in iPod, but I cannot share the pass by email or link from web server. From the documentation I read

Answer 1

For a pure PHP solution, add your .pkpass bundle to the server, then create the following file and name this file pass.php.

Then create a second file linking to the file you created above.

Click to download your pass