Changeset 50127 for trunk/src/wp-includes/post-template.php

Timestamp:

02/01/2021 09:20:44 PM (4 years ago)

Author:

johnbillion

Message:

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()).

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

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

Fixes #33045

File:

• trunk/src/wp-includes/post-template.php (modified) (1 diff)

trunk/src/wp-includes/post-template.php

@@ -1964 +1964 @@
     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 );
+}