<https://www.webhostingsecretrevealed.net/blog/inbound-marketing/5-simple-php-scripts-to-help-increase-website-led-conversions/#primaryimage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.webhostingsecretrevealed.net/blog/inbound-marketing/5-simple-php-scripts-to-help-increase-website-led-conversions/>