How can I take an image that has been entered into Wordpress and fit it into a specific sized div without losing it's aspect ratio?
The div is 104px x 104px but the user could literally enter an image into Wordpress at any size.
I'm using the following to insert the image from Wordpress into the page:
<img border="0" src="<?php the_sub_field('logo'); ?>" alt="<?php the_sub_field('text'); ?>" />
I haven't set a width or height.