PHP Manual: Poll the channels/listeners/streams for events

int ssh2_poll(array &$desc, int $timeout = 30)

Polls the channels/listeners/streams for events, and returns the number of descriptors which returned non-zero revents.

Warning

This function is currently not documented; only its argument list is available.

desc: An indexed array of subarrays with the keys 'resource' and 'events'. The value of the resource is a (channel) stream or an SSH2 Listener resource. The value of the event are SSH2_POLL* flags bitwise ORed together. Each subarray will be populated with an 'revents' element on return, whose values are SSH2_POLL* flags bitwise ORed together of the events that occurred.
timeout: The timeout in seconds.

Returns the number of descriptors which returned non-zero revents.