I upgraded my PHP 5.6.30 (https://www.apachefriends.org/de/download.html) to PHP 7.0 (https://bitnami.com/stack/wamp/installer)
Everything worked fine so far and it
We need x86 driver from Microsoft. http://www.microsoft.com/ja-jp/download/details.aspx?id=13255 *Sorry, 'ja-jp' is mine. Please select your country. There are 2 drivers, one is 32bit, but we need 64bit(x86) version. Then we could set "ODBC data source (64bit)". It appears on the window. Last, check your web. Maybe it works. Mar. 29th. 2016 Naio