在Windows机器上设置PHPUnit得到错误运行'phpunit --version'php无法识别

Hi I'm following the instructions on this site for installing PHPUnit on Windows. https://phpunit.de/manual/current/en/installation.html

I've followed the instructions exactly but when I attempt to run step 6

`C:\Users\username> phpunit --version 

I get the error:

'php is not recognized as an internal or external command'.

From what I've read online it seems to be a path problem. My path is set to C:\bin as in the instructions and my phpunit.cmd and phpunit.phar are both in there. Not sure what I'm doing wrong or what to do next can anyone help?

Edit: Don't think this question is a duplicate, I had a PHP system variable path set up before with no problem, plus the problem is php is not recognised, not php.exe