isotopie

<?php 

	// is child of, recursive

	function is_child_of( $post, $possible_parent_ID ) {
		if ($post->ID == $possible_parent_ID) {
			return true;
		} elseif ($post->post_parent == 0) {
			return false;
		} else {

isotopie

<?php
if (!function_exists('get_post_id_by_meta_key_and_value')) {
	/**
	 * Get post id from meta key and value
	 * @param string $key
	 * @param mixed $value
	 * @return int|bool
	 * @author David M&aring;rtensson <david.martensson@gmail.com>
	 */
	function get_post_id_by_meta_key_and_value($key, $value) {