Get posts loops [WordPress]

custom_posts.php

<?php
/**
 * Using get_posts() function
 */ 
$custom_posts = get_posts( array(
	'post_type' => 'post_type_name',
) );
$tmp_post = $post; foreach ( $custom_posts as $post ) : setup_postdata( $post ); 

	// loop

endforeach; $post = $tmp_post;

/**
 * Using WP_Query object
 */ 
$query = new WP_Query( array(
	'post_type' => 'post_type_name',
) );
if ( $query->have_posts() ) : while ( $query->have_posts() ) : $query->the_post();

	// loop

endwhile; endif;