title: PhpStorm / Google AppEngine with PHP7
body: <p>I recently deployed my app using Google App Engine. I installed Google Cloud SDK and I'm using PhpStorm.</p>
  
  <p>When I run my app using <code>runtime : php55</code>, it works. But I need PHP 7!</p>
  
  <p>When I try with </p>
  
  <pre><code>runtime: php
  
  env: flex
  
  A error occured : flex, only the following runtimes are allowed: ('python-compat', 'java', 'java7', 'go', 'custom')
  </code></pre>
  
  <p>Do you have an idea?</p>
  
  <p>Here is my app.yaml config:</p>
  
  <p><a href="https://i.stack.imgur.com/kjyAr.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/kjyAr.png" alt="enter image description here"></a></p>
  
  <p>Here is my composer.json config:</p>
  
  <p><a href="https://i.stack.imgur.com/pvegq.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/pvegq.png" alt="enter image description here"></a></p>
  
  <p>Here is my PhpStorm config:</p>
  
  <p><a href="https://i.stack.imgur.com/DdIYw.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/DdIYw.png" alt="enter image description here"></a></p>
  
  <p><a href="https://i.stack.imgur.com/EOjlm.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/EOjlm.png" alt="enter image description here"></a></p>