Little collection of WordPress utility

functions-theme.php

/*
 * Apply transient cache and return posts (like get_posts)
 * 
 * @param array $args query params WP_Query
 * @param string $transient_name
 * @param string $transient_expiration Optional defaul 7200
 */
function cache_posts( $args , $transient_name , $transient_expiration = 7200 ){

	if ( false === ( $posts = get_transient( $transient_name  ) ) ) {

			wp_reset_query();
	
			$the_query = new WP_Query(); 
			$the_query->query( $args );

			$posts = $the_query->posts;
			set_transient(  $transient_name  , $posts , $transient_expiration );
	
		}

	return $posts;
	
	}

/*
 * Loop query result and get foreach post call get_template_part
 *
 * @param object $posts accept WP_Query->posts or get_posts() 
 * @param string $template_slug name of template 
 */
function loop_template( $posts, $template_slug , $template_name = null ){
	global $post;
	$post_temp = $post; 

	foreach($posts as $post) : 
		setup_postdata($post); 
		get_template_part( $template_slug , $template_name );
	endforeach;
	
	$post = $post_temp;
	
	}