Run a Powershellscript by clicking a button on HTML/PHP -

i'm trying find out, how can run simple powershellscript clicking on button. doing wrong?

i tried following:

<input type="button"> onclick="<?php hello.ps1; ?>">

and one:

<input type="button" onclick="hello.ps1" value="send" name="button"/> 

inside .ps1 following:

write-output "hello world"