title: php json decode blank page
body: <p>Hello I want to decode json. My code below:</p>
  
  <pre><code>&lt;?php
  $json = '{"response":{"count":1,"items":[{"id":165983743,"owner_id":170785079,"title":"Ke$ha - Blow","duration":253,"description":"","date":1379017507,"views":1,"comments":0,"photo_130":"http:\/\/cs518121.vk.me\/u170785079\/video\/s_5e5f6f2c.jpg","photo_320":"http:\/\/cs518121.vk.me\/u170785079\/video\/l_dd4ec237.jpg","files":{"mp4_240":"http:\/\/cs518121v4.vk.me\/u170785079\/videos\/500770e51c.240.mp4","mp4_360":"http:\/\/cs518121v4.vk.me\/u170785079\/videos\/500770e51c.360.mp4","mp4_480":"http:\/\/cs1-46v4.vk.me\/p13\/483502b20c4f.480.mp4","mp4_720":"http:\/\/cs518121v4.vk.me\/u170785079\/videos\/500770e51c.720.mp4"},"player":"http:\/\/vk.com\/video_ext.php?oid=170785079&amp;id=165983743&amp;hash=1e417a266e9a3f00"}]}}';
  
  $obj = json_decode($json);
  print_r ($obj);
  print $obj-&gt;{'response'}-&gt;{'items'}-&gt;{'files'}-&gt;{'mp4_240'};
  </code></pre>
  
  <p>But I get a blank page</p>