title: How to use print_r of PHP in browser
body: <p>I am using this php script for predictionIO. The print_r php function works well in terminal &amp; prints the array corresponding to user 1 &amp; num 4. Now i want to run the script in browser &amp; print similar result(right now nothing is shown in browser using this PHP script)</p>
  
  <pre><code>&lt;?php
  require_once("/home/deepak/vendor/autoload.php");
  
  use predictionio\EngineClient;
  $engineClient = new EngineClient('http://192.168.1.13:8000');
  $response = $engineClient-&gt;sendQuery(array("user"=&gt;"1", "num"=&gt;4));
  
  print_r($response);
  echo '$response';
  ?&gt;
  </code></pre>