stream_isatty
(PHP 7 >= 7.2.0)
stream_isatty — Check if a stream is a TTY
Description
stream_isatty ( resource $stream ) : bool
Determines if stream stream refers to a valid terminal type device. This is a more portable version of posix_isatty(), since it works on Windows systems too.
Parameters
-
stream
Return Values
Returns true on success or false on failure.
Examples
Example #1 stream_isatty() example
This command can be used to determine if a standard output / standard error stream is redirected to a file.
php -r "var_export(stream_isatty(STDERR));"
The above example will output something similar to:
true
php -r "var_export(stream_isatty(STDERR));" 2>output.txt
The above example will output something similar to:
false
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https://www.php.net/manual/en/function.stream-isatty.php