PHP and H1 tag SEO question

Hi, your help / knowledge is appreciated.
I'm doing some SEO work for a client who has a PHP website.
Please can you look at the following 'header' code. Is the 'page-heading' tag the same as having an H1 tag in the code? I want to ensure that the headlines are set up to be read by Google robots as H1 tag. Does this need changing???
<div class="page-heading">Browse Property for sale – Al Reef Villas, Reem island</div>
Thanks in advance!

See original post by Abu Dhabi