Description:
------------
Strictly related to https://bugs.php.net/bug.php?id=72768

If we enable color support for Windows, scripts may want to know if the output is redirected to file.

For instance, we may print colored text if the standard output is not redirected to file, but we may want to avoid ANSI control sequences if the output is redirected to a file.

I wrote a sample C program that does this check: https://gist.github.com/mlocati/21a9233ac83f7d3d7837535bc109b3b7

For posix systems it's already possible by using the posix_isatty PHP function (see what's doing Symfony for instance: https://github.com/symfony/symfony/blob/2909e4b04d04653286b8d63b19e11a40157497b5/src/Symfony/Component/Console/Output/StreamOutput.php#L101 )

Test script:
---------------
<?php

if (SomeWayToDetermineIfStdoutIsRedirectedToFile) {
   echo "Plain text";
} else {
   echo \033[101;93m Colored text \033[0m\n"
}