[WordPress] Add 'Template' column to the post list

<?php
function mxd_columns($columns) {
	$columns['template'] = 'Template';
	return $columns;
}

function mxd_show_template_columns($name, $post_id) {
	$template = get_post_meta($post_id, '_wp_page_template', true);
	echo $template;
}

// articles CPT
add_filter('manage_articles_posts_columns', 'mxd_columns');
add_action('manage_articles_posts_custom_column',  'mxd_show_template_columns', 10, 2);