How to install mongodb in php

Well I've been trying to solve this for some time and impossible, I try to connect mongodb to php.

Image of the php version

The steps I take are:

I download the dll in this case I use this: php_mongo-1.6.8-5.6-vc11-x86_64.dll

Then I rename it to php_mongo.dll

Then I put it in php / ext

Then I add the extension in the php.ini _ = extension = php_mongodb.dll;

Then I restart the appserv and nothing does not appear in the php info. any solution?