From 4d5709b11d7d0a76148a3fbdd2dbcebeb3c9bc9b Mon Sep 17 00:00:00 2001
From: Dion Hulse <dd32@git.wordpress.org>
Date: Sat, 10 Apr 2010 11:42:45 +0000
Subject: [PATCH] Introduce is_post_type_hierarchical(). Props ptahdunbar. See
 #12950

git-svn-id: https://develop.svn.wordpress.org/trunk@14053 602fd350-edb4-49c9-b593-d223f7449a82
---
 wp-includes/post.php | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/wp-includes/post.php b/wp-includes/post.php
index 3fd27d6823..b26d038186 100644
--- a/wp-includes/post.php
+++ b/wp-includes/post.php
@@ -660,6 +660,28 @@ function get_post_stati( $args = array(), $output = 'names', $operator = 'or' )
 	return $post_statuses;
 }
 
+/**
+ * Whether the post type is hierarchical.
+ *
+ * A false return value might also mean that the post type does not exist.
+ *
+ * @since 3.0.0
+ * @see get_post_type_object
+ *
+ * @param string|int|object $post Post type name, post id, or a post object.
+ * @return bool true if post type is hierarchical, else false.
+ */
+function is_post_type_hierarchical( $post = false ) {
+	if ( is_string($post) && $is_post_type = get_post_type_object($post) )
+		return $is_post_type->hierarchical;
+	
+	$ptype = get_post( $post );
+	if ( $ptype && $is_post_type = get_post_type_object($ptype->post_type) )
+		return $is_post_type->hierarchical;
+		
+	return false;
+}
+
 /**
  * Retrieve the post type of the current post or of a given post.
  *