WP: Shortcode Function

gistfile1.txt

// Shortcode to insert the latest article in the prayer corner section
function sc_prayercorner (){
	$args = array( 
        'numberposts' => 1,
        'post_type' => 'prayer_corner', 
        'post_status' => 'publish',
        'orderby' => 'post_date'
    );
    $postslist = get_posts( $args );
	foreach($postslist as $post) : setup_postdata($post); 
	   	$tmpString =  '<div>' . get_the_post_thumbnail($id, array(460,auto));
	   	$tmpString = $tmpString . '<h3>' . $post->post_title;
	   	$tmpString = $tmpString .  '</h3><p>' . $post->post_content;   
		$tmpString = $tmpString .  '</p></div>';
		return $tmpString;
	endforeach;
}
add_shortcode('prayercorner', 'sc_prayercorner');