title: Show secondary image on hover in OpenCart
body: <p>I have the default theme in OpenCart 2.0 and when I hover a product I want the secondary image to be shown (if there is a secondary on that product) instead of the first one. Then back again.</p>
  
  <p>Is this possible? </p>
  
  <p>Edit: The code I want is not how to make the effect happen. What I want is to know how the code looks like when I call on the other image with PHP. </p>