(PHP 4, PHP 5, PHP 7)
Determine if a file descriptor is an interactive terminal
bool posix_isatty ( mixed $fd )
Determines if the file descriptor fd refers to a valid terminal type device.
Parameters:
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.
Returns:
Returns TRUE if fd is an open descriptor connected to a terminal and FALSE otherwise.
See also:
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