title: Ubuntu - PHP | notify-send looks different when called through PHP
body: <p>I am currently working on building a php command line app and I make use of <code>notify-send</code> to send notification in my <code>Ubuntu 17.10</code> which now comes with gnome.</p>
  <p>The notifications look fine and as they should when I manually run the cli app in terminal. (at the top, in notification center)</p>
  <p><a href="https://i.stack.imgur.com/hCL2F.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/hCL2F.png" alt="enter image description here" /></a></p>
  <p>but when the same app is run through a cron job the notificaiton looks completely different and is displayed in a different location! (top right)</p>
  <p><a href="https://i.stack.imgur.com/TQYND.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/TQYND.png" alt="enter image description here" /></a></p>
  <p>I am calling the notify-send in my app using <code>exec('notify-send tas)</code></p>
  <p>The problem I have with the slightly different looking notification is I can not click on the hyper-links! while the other one supports clicking on hyper-links and then it opens up  web page.</p>
  <p>What is going wrong here?</p>