Wamp/Client.php
public function prefix($prefix, $uri)
    {
        $type = Protocol::MSG_PREFIX;
        $data = [$type, $prefix, $uri];
        $this->send($data);
    }
public function prefix($prefix, $uri)
    {
        $type = Protocol::MSG_PREFIX;
        $data = [$type, $prefix, $uri];
        $this->send($data);
    }
public function prefix ( $ prefix , $ uri ) { $ type = Protocol :: MSG_PREFIX ; $ data = [ $ type , $ prefix , $ uri ] ; $ this -> send ( $ data ) ; }
Establish a prefix on server.

@see http://wamp.ws/spec#prefix_message

@param string $prefix
@param string $uri
Establish a prefix on server .