if you are looking for default values in php.ini look no more
http://www.php.net/manual/en/ibase.configuration.php

the are removed from the default php.ini so you must add them manually
Here is why http://wiki.php.net/rfc/newinis

I found it the hard way installing php 5.2.12 on windows
http://www.php.net/get/php-5.2.12-Win32.zip/from/a/mirror



I guess is time to sing Lithium

http://lyrics.wikia.com/Nirvana:Lithium