Server Client Architecture, best parctice

Hi! I would like to know what does the community think of the best architecture for server client communication and why? That is, if there is a server in C++ (say a game server) and the PHP has to 'read' data 'from' the server then what is the best form of communication? a) Shared Memory : Server opens the shared memory in write and the PHP scripts open it in read and gets the data b) TMPFS (just like shared memory): Server opens a file in tmpfs in write and PHP in read c) Databases: Server Updates a table in the DB and client reads from the table d) Files: Same as TMPFS Regards, Yaswanth -- "In theory there is no difference between theory and practice. In practice there is." -- Fortune Cookie