title: PHP5 application is not working in PHP7 live server (ubuntu 16.04) -
body: <p>I have a php application. Its built in php (raw php). In my local pc its running. but when I upload to live server (ubuntu 16.04) then it doesn't work. </p>
  
  <p>I have installed all php dependencies in Live server ... Still the files are not working. I found some problem in live server as given below: </p>
  
  <ol>
  <li>Raw PHP (5.4 version coded ) is not working </li>
  <li>Class does not call from Index.php file</li>
  <li>When I run <code>exit("OK")</code> its return <code>OK</code> but page not running</li>
  <li>when I add a class like <code>$doc = ClassName::getInstance();</code> its not running.. Returns <code>NULL</code></li>
  </ol>
  
  <p>I think I made very silly silly mistakes. Here is the live server info : </p>
  
  <ol>
  <li><p>IP 35.160.167.129</p></li>
  <li><p>info.php : <a href="http://35.160.167.129/info.php" rel="nofollow noreferrer">http://35.160.167.129/info.php</a> => its running</p></li>
  </ol>
  
  <p>Would you please help me how do I resolve this issue. Thanks in advance</p>