WordPress get_template_part() Including a custom template with a dash-separated filename located inside a directory
Example
<?php get_template_part( 'dir/foo', 'bar' ); ?>
Includes
../wp-content/themes/your-theme-slug/dir/foo-bar.php
<?php get_template_part( 'dir/foo', 'bar' ); ?>
Includes
../wp-content/themes/your-theme-slug/dir/foo-bar.php
