wp_get_post_parent_id( int $post_ID )

Return the post’s parent’s post_ID

Parameters

$post_ID

(int) (Required)

Return

(int|false) Post parent ID, otherwise false.

Source

File: wp-includes/post.php 

function wp_get_post_parent_id( $post_ID ) {
	$post = get_post( $post_ID );
	if ( !$post || is_wp_error( $post ) )
		return false;
	return (int) $post->post_parent;
}

Expand Source Code View on GitHub

Related

Uses

Uses
Uses Description
wp-includes/post.php: get_post()

Retrieves post data given a post ID or post object.
wp-includes/load.php: is_wp_error()

Check whether variable is a ClassicPress Error.

Changelog

Changelog
Version Description
WP-3.1.0 Introduced.