Great work !
This library is really well done and useful ! It opens lots of perspectives, especially for people working with SAP web based applications; it can also extends backoffice processes possibilities, as PHP can be used as a shell script.
I'm using the PHP/SAPRFC lib on a Windows 2000 server and it works perfectly. Just an installation tip, not mentionned in the documentation : you need to have <b>msvcp60.dll</b> in your WINDOWS directory in order that PHP can load the php_saprfc.dll.
Keep up the good work :-)