(No version information available, might only be in Git) Set the idle callback function

(PECL zmq >= 0.5.0) Construct a new ZMQSocket

(PECL zmq >= 0.5.0) Sends a message public

(PECL zmq >= 0.5.0) Whether the context is persistent

(PECL zmq >= 0.5.0) Get socket option public