Pinterest button shortcode

pinterest.php

<?php

// Usage [pin img="<url>" title="<title>"]

function yoast_pinterest_shortcode( $atts ) {
	extract( shortcode_atts( array(
			'url' => get_permalink(),
			'img' => '',
			'title' => get_the_title(),
			'align' => 'alignright'
	), $atts ) );
	
	return '<div class="'.esc_attr( $align ).'"><a href="http://pinterest.com/pin/create/button/?url='.esc_attr( urlencode($url) ).'&media='.esc_attr( urlencode($img) ).'&description='.esc_attr( urlencode( $title) ).'" class="pin-it-button" count-layout="vertical"><img border="0" src="//assets.pinterest.com/images/PinExt.png" title="Pin It" /></a><script type="text/javascript" src="//assets.pinterest.com/js/pinit.js"></script></div>';
	
}
add_shortcode( 'pin', 'yoast_pinterest_shortcode' );