MAMP PHP 5.6.2 mssql.so extension not installing

Question

I'm having trouble installing the mssql.so extension in MAMP on Yosemite. I've followed the following tutorial multiple times, with no luck:

http://blog.benjaminwalters.net/?p=10

I'm using PHP v5.6.2; therefore, used/compiled the 5.6.2 version from source when following that section of the tutorial. I've placed the mssql.so library file in the extensions directory as instructed and added the appropriate extension=mssql.so line to the correct version of the php.ini file as displayed from the phpInfo page, in the Loaded Configuration File section of the MAMP start portal.

After these things, the same phpInfo page still does not display the mssql sub-section in the installed extensions area and I am still getting the following error:

Fatal error: Call to undefined function mssql_connect() in /Users/sadmicrowave/Documents/Coding/Astoria/bin/commonfunctionlibrary.php on line 16

I'm not sure what else to do to try and install this extension and get mssql_connect() to work. Any ideas?