title: Set default version of Php in CentOS 7
body: <p>I have two versions of PHP in <code>opt/remi</code> folder <code>php56</code> and <code>php72</code>
  but when I <code>php -v</code> on cmd it shows:</p>
  <pre><code>Copyright (c) 1997-2016 The PHP Group
  Zend Engine v2.6.0, Copyright (c) 1998-2016 Zend Technologies
      with Zend OPcache v7.0.6-dev, Copyright (c) 1999-2016, by Zend Technologies
      with Xdebug v2.4.1, Copyright (c) 2002-2016, by Derick Rethans
  </code></pre>
  <p>How to set default version to PHP 7.2?</p>