<?php Swoole\Process::pop (int $maxsize = 8192) : array
the max size of data to read from the message queue
If failed, it returns
FALSE. Or it returns the data.
In the blocking mode, if the queue is empty, the call of this method will block.
In the non-blocking mode, if the queue is empty, the call of this method will return
FALSE immediately and set the error code to
Read and pop data from the message queue.