Want to create a +1 link on your website? A +1 link can help your readers easily share your page with their Google+ followers. All you have to do is add the following code to your template file, such as single.php, just after
the_content() function. The best part is that unlike a +1 button built with js, this link won’t slow down your site.
<a target="_blank" href="https://plusone.google.com/_/+1/confirm?hl=en&url=<?php the_permalink(); ?>">+1</a>