title: Cannot brew uninstall or unlink php in my mac
body: <p>I have this php currently running on my machine mac<br></p>
  
  <pre><code>PHP 7.3.9 (cli) (built: Nov  9 2019 08:08:13) ( NTS )
  Copyright (c) 1997-2018 The PHP Group
  Zend Engine v3.3.9, Copyright (c) 1998-2018 Zend Technologies`
  </code></pre>
  
  <p>But when I try to brew uninstall or unlink it simply appear the error like this</p>
  
  <blockquote>
    <p>Error: No such keg: /usr/local/Cellar/php@7.3</p>
  </blockquote>
  
  <p>My reason is I want to install and use another version of php for example I want to use php@5.6</p>