title: use PlantUML diagram code in PHP/Phabricator
body: <p>Looking for advice from developers phamiliar with PHP, or <a href="https://secure.phabricator.com/" rel="nofollow noreferrer">Phabricator</a> internals,
  on how to make <a href="https://github.com/phacility/phabricator" rel="nofollow noreferrer">Phabricator</a> to have <a href="https://plantuml.com/" rel="nofollow noreferrer">PlantUML (text to UML diagrams)</a> within wiki pages, tasks. So that this UML code snippet in GitHub/<a href="https://docs.gitlab.com/ee/administration/integration/plantuml.html" rel="nofollow noreferrer">GitLab grammar</a></p>
  <pre><code>```plantuml
  
  Bob-&gt;Alice : hello
  
  ```
  </code></pre>
  <p>would be shown as diagram on rendered wiki page.</p>
  <p><img src="https://i.stack.imgur.com/yyLBZ.png" alt="sequence diagram generated example" /></p>
  <p>&quot;Call it from PHP&quot; page on <a href="https://plantuml.com/demophp.php" rel="nofollow noreferrer">https://plantuml.com/demophp.php</a> is <code>404 - Not Found</code>.</p>
  
  <p>UPDATE Please add answer with any further improvements or suggestions.</p>