Hi Nitin,
I am not PHP expert (not even beginner), but there had been excellent blogs on this forum. I hope you got a chance to go through these. Check if these are helpful.
http://scn.sap.com/community/developer-center/hana/blog/2013/01/21/php-rocks-on-sap-hana-too
http://scn.sap.com/community/developer-center/hana/blog/2013/05/30/angularjs-php-and-sap-hana
Regards,
Ravi