对于IIS，php 5,6.8或7是否存在打印机扩展？

I currently have php 5.6.8 installed and would rather have php 7

I'm trying to:

1. get a list of network shared printers and
   
2. be able to print envelopes to any one of those printers.

I've tried a 5.6.8 windows provided version, but it doesn't work.
I have the php_printer.dll in the ext folder and
extension=php_printer.dll in php.ini
No printer extension shows up with phpinfo()

Is there any way to access network printers with php 5.6.8 on an x64 Windows box using IIS?