Add Google +1 Button Under Each Post in WordPress

This tip can be applied to any other content you’d like to dynamically add to the end of your posts, but here’s how to add a Google +1 recommendation button under each post:
Open your theme’s functions.php file and paste the following code:

//Google +1 Button below each postfunction add_google_plus_one($content) { if(!is_feed() && !is_home() && !is_page()) {  $content .= '<g:plusone></g:plusone>'; } return $content;}add_filter('the_content', 'add_google_plus_one');
//add Google +1 Button script in headfunction add_google_plus_one_script() { if(!is_feed() && !is_home() && !is_page()) {  echo '<script type="text/javascript" src="http://apis.google.com/js/plusone.js"></script>'; }}
add_action('wp_head', 'add_google_plus_one_script');

For many other social sharing buttons you can skip the part about adding a script into the head tag, but the Google +1 button requires this to function.