WordPress开发者和主题制作者的搜索引擎



wp_check_for_changed_dates ›

Since4.9.3
已弃用n/a
wp_check_for_changed_dates ( $post_id, $post, $post_before )
参数: (3)
  • (int) $post_id Post ID.
    Required: Yes
  • (WP_Post) $post The Post Object
    Required: Yes
  • (WP_Post) $post_before The Previous Post Object
    Required: Yes
定义在:
文档:

Check for changed dates for published post objects and save the old date.

The function is used when a post object of any type is updated, by comparing the current and previous post objects.

If the date was changed and not already part of the old dates then it will be added to the post meta field ('_wp_old_date') for storing old dates for that post.

The most logically usage of this function is redirecting changed post objects, so that those that linked to an changed post will be redirected to the new post.



源码

function wp_check_for_changed_dates( $post_id, $post, $post_before ) {
	$previous_date = date( 'Y-m-d', strtotime( $post_before->post_date ) );
	$new_date = date( 'Y-m-d', strtotime( $post->post_date ) );
	// Don't bother if it hasn't changed.
	if ( $new_date == $previous_date ) {
		return;
	}
	// We're only concerned with published, non-hierarchical objects.
	if ( ! ( 'publish' === $post->post_status || ( 'attachment' === get_post_type( $post ) && 'inherit' === $post->post_status ) ) || is_post_type_hierarchical( $post->post_type ) ) {
		return;
	}
	$old_dates = (array) get_post_meta( $post_id, '_wp_old_date' );
	// If we haven't added this old date before, add it now.
	if ( ! empty( $previous_date ) && ! in_array( $previous_date, $old_dates ) ) {
		add_post_meta( $post_id, '_wp_old_date', $previous_date );
	}
	// If the new slug was used previously, delete it from the list.
	if ( in_array( $new_date, $old_dates ) ) {
		delete_post_meta( $post_id, '_wp_old_date', $new_date );
	}
}