Add Email This Option to Bottom of Post

functions.php

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

//* Add Email This Option to Bottom of Post
add_filter( 'the_content', 'wps_add_email_this_button' );
function wps_add_email_this_button($content){

	if (is_single()) {

		$content .= '<a class="mail-btn" href="mailto:?subject=' . get_the_title() . '&amp;body=' . get_the_permalink() . '" title="Send this article to a friend!">Email this</a>';
	}

    return $content;

}