Need help with PHP and stored procedures

[BarMonger]

I'm trying to call a stored procedure (on a MSSQL server) in php. I'm currently using odbc_exe to call them , and it works fine, except I cannot pass parameters with that function.
The PHP manual isn't really helpful, and googling just shows that I'm not the only one with that problem.

Does anyone know how to pass parameters to stored procedures in php?

TIA