Could not open input file: /cygdrive/c/PHP/phpunit (PHP under Cygwin)

The problem:

$ /cygdrive/c/PHP/php.exe /cygdrive/c/PHP/phpunit
Could not open input file: /cygdrive/c/PHP/phpunit

Environment:

MS Windows
PHP
Cygwin

Explanation:

While started in Cygwin, php.exe will be run in Windows environment, which does not know how to translate /cygdrive/c to C:\

Solution:

Use a wrapper script https://gist.github.com/tivnet/8256140
(Originally published by aefxx here)