Add Pinterest pin-it button to woocommerve single product page

functions.php

<?php
//* Do NOT include the opening php tag shown above. Copy the code shown below.

//* Add Pinterest pin-it button to woocommerve single product page
add_action('woocommerce_share', 'wps_pinterest_share' );
function wps_pinterest_share(){

	  global $post;
    $pinterestimage 	= wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), 'full' );
    $pinterestbutton	= '//assets.pinterest.com/images/pidgets/pinit_fg_en_rect_gray_20.png';

    echo '<a data-pin-do="buttonPin" href="//www.pinterest.com/pin/create/button/?url='.get_permalink().'&media='. $pinterestimage[0].'&description=' .urlencode(get_the_title()). '"><img src="' . $pinterestbutton . '" /></a>';

}