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Posts, Post Types: Introduce new functions for determining if a post has a parent (has_post_parent()) and to fetch the post parent (get_post_parent()).

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These functions are simple but reduce the logic needed in themes and plugins.

Props ramiy, sebastian.pisula, birgire, audrasjb, xkon

Fixes #33045


git-svn-id: https://develop.svn.wordpress.org/trunk@50127 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
John Blackbourn
2021-02-01 21:20:44 +00:00
parent 5c5f859d45
commit 729bb10f31
2 changed files with 86 additions and 0 deletions
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25
src/wp-includes/post-template.php
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@@ -1963,3 +1963,28 @@ function wp_list_post_revisions( $post_id = 0, $type = 'all' ) {
echo $rows;
echo '</ul>';
}
/**
* Retrieves the parent post object for the given post.
*
* @since 5.7.0
*
* @param int|WP_Post|null $post Optional. Post ID or WP_Post object. Default is global $post.
* @return WP_Post|null Parent post object, or null if there isn't one.
*/
function get_parent_post( $post = null ) {
$wp_post = get_post( $post );
return ! empty( $wp_post->post_parent ) ? get_post( $wp_post->post_parent ) : null;
}
/**
* Returns whether the given post has a parent post.
*
* @since 5.7.0
*
* @param int|WP_Post|null $post Optional. Post ID or WP_Post object. Default is global $post.
* @return bool Whether the post has a parent post.
*/
function has_parent_post( $post = null ) {
return (bool) get_parent_post( $post );
}