检测stdin是PHP中的tty设备(终端)还是管道? [英] Detect if stdin is a tty device (terminal) or pipe in PHP?

问题描述

我写了一个php脚本.在交互读取和执行之前，我希望它在连接到tty设备(终端)的标准输入中调用时显示帮助消息，但是在以管道中的文件或流作为标准输入时调用时不显示.

I wrote a php script. I want it show help message when called with standard input connected to a tty device (terminal) before reading and executing interactively, but dont show when called with a file or stream from pipe as standard input.

有没有一种方法可以从PHP中检测到这一点?

Is there a way to detect this from PHP?

推荐答案

使用此函数同时接受文件描述符(整数)和PHP流.如果收到PHP流，它将自动尝试对其进行广播，以获取文件描述符并改为使用它.

This function accepts both a file descriptor (an integer) and a PHP stream. If it receives a PHP stream, it automatically attempts to cast it in order to obtain a file descriptor and use it instead.

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