SAML Implementation in php using browser post profile

[phpbull]

Hi buddy,
I am trying to implement the Single Sing On functionality using SAML.
I am using browser post profile for SAML.
But I am getting the problem to verify the signature given in SAML response document.
Please help me to get resolve this problem as soon as possible..

Right now I m in a thick soap..

Thanks
-PHPBULL