posix_isatty

(PHP 4, PHP 5, PHP 7)

posix_isatty — Determine if a file descriptor is an interactive terminal

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posix_isatty ( mixed $fd ) : bool

Determines if the file descriptor fd refers to a valid terminal type device.

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fd

The file descriptor, which is expected to be either a file resource or an integer. An integer will be assumed to be a file descriptor that can be passed directly to the underlying system call.

In almost all cases, you will want to provide a file resource.

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Returns TRUE if fd is an open descriptor connected to a terminal and FALSE otherwise.

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