You can use the same channels in PHP for input, standard output, and output to the error channel, respectively.
您可以将php中的相同通道分别用于输入、标准输出和输出到错误通道。
2
In V6, this has been replaced by a channel framework based configuration, which is a much more flexible mechanism for supporting the inputandoutput of transport end points.
在版本6中，基于配置的通道框架将其取而代之，且是一种能够支持传送端点输入输出的更加灵活的机制。
3
That is, a channel guard is ready if and only if the process at the other end of the channel has output to it and this data has not yet been input by this process.