posix_isatty
PHP 4, PHP 5, PHP 7, PHP 8
posix_isatty - Determine if a file descriptor is an interactive terminal
Manual
posix_isatty(
resource|int$file_descriptor ): bool
Determines if the file descriptor file_descriptor refers to a valid terminal type device.
Parameters
- 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.
Return Values
Returns true if file_descriptor is an open descriptor connected to a terminal and false otherwise.