Php/docs/function.posix-isatty

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posix_isatty

(PHP 4, PHP 5, PHP 7)

posix_isattyDetermine if a file descriptor is an interactive terminal


说明

posix_isatty ( mixed $fd ) : bool

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


参数

fd

The file descriptor, which is expected to be either a file resource or an int. An int 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.


返回值

Returns true if fd is an open descriptor connected to a terminal and false otherwise.


参见