wp-includes/class-wp-customize-nav-menus.php:955Adds a new auto-draft post.
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WP_Post|WP_Error public function insert_auto_draft_post( $postarr ) { if ( ! isset( $postarr['post_type'] ) ) { return new WP_Error( 'unknown_post_type', __( 'Invalid post type.' ) ); } if ( empty( $postarr['post_title'] ) ) { return new WP_Error( 'empty_title', __( 'Empty title.' ) ); } if ( ! empty( $postarr['post_status'] ) ) { return new WP_Error( 'status_forbidden', __( 'Status is forbidden.' ) ); } /* * If the changeset is a draft, this will change to draft the next time the changeset * is updated; otherwise, auto-draft will persist in autosave revisions, until save. */ $postarr['post_status'] = 'auto-draft'; // Auto-drafts are allowed to have empty post_names, so it has to be explicitly set. if ( empty( $postarr['post_name'] ) ) { $postarr['post_name'] = sanitize_title( $postarr['post_title'] ); } if ( ! isset( $postarr['meta_input'] ) ) { $postarr['meta_input'] = array(); } $postarr['meta_input']['_customize_draft_post_name'] = $postarr['post_name']; $postarr['meta_input']['_customize_changeset_uuid'] = $this->manager->changeset_uuid(); unset( $postarr['post_name'] ); add_filter( 'wp_insert_post_empty_content', '__return_false', 1000 ); $r = wp_insert_post( wp_slash( $postarr ), true ); remove_filter( 'wp_insert_post_empty_content', '__return_false', 1000 ); if ( is_wp_error( $r ) ) { return $r; } else { return get_post( $r ); } }Introduced in 4.7.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/class-wp-customize-nav-menus.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.