Question

wp_transition_post_status( string $new_status,  string $old_status,  WP_Post $post )

Fires actions 相关函数 to the transitioning of a post’s status.

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description

When a post is saved, the post status is "transitioned" from one status to another, though this does not always mean the status has actually changed before and after the save. This function fires a number of action hooks 相关函数 to that transition: the generic ‘transition_post_status’ action, as well as the dynamic hooks ‘$old_status_to_$new_status’ and ‘$new_status_$post->post_type’. Note that the function does not transition the post object in the database.

For instance: When publishing a post for the first time, the post status may transition from ‘draft’ – or some other status – to ‘publish’. However, if a post is already published and is simply being updated, the "old" and "new" statuses may both be ‘publish’ before and after the transition.

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参数

$new_status

(string) (Required) Transition to this post status.

$old_status

(string) (Required) Previous post status.

$post

(WP_Post) (Required) Post data.

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源代码

File: wp-includes/post.php

function wp_transition_post_status( $new_status, $old_status, $post ) {
	/**
	 * Fires when a post is transitioned from one status to another.
	 *
	 * @since 2.3.0
	 *
	 * @param string  $new_status New post status.
	 * @param string  $old_status Old post status.
	 * @param WP_Post $post       Post object.
	 */
	do_action( 'transition_post_status', $new_status, $old_status, $post );

	/**
	 * Fires when a post is transitioned from one status to another.
	 *
	 * The dynamic portions of the hook name, `$new_status` and `$old status`,
	 * refer to the old and new post statuses, respectively.
	 *
	 * @since 2.3.0
	 *
	 * @param WP_Post $post Post object.
	 */
	do_action( "{$old_status}_to_{$new_status}", $post );

	/**
	 * Fires when a post is transitioned from one status to another.
	 *
	 * The dynamic portions of the hook name, `$new_status` and `$post->post_type`,
	 * refer to the new post status and post type, respectively.
	 *
	 * Please note: When this action is hooked using a particular post status (like
	 * 'publish', as `publish_{$post->post_type}`), it will fire both when a post is
	 * first transitioned to that status from something else, as well as upon
	 * subsequent post updates (old and new status are both the same).
	 *
	 * Therefore, if you are looking to only fire a callback when a post is first
	 * transitioned to a status, use the {@see 'transition_post_status'} hook instead.
	 *
	 * @since 2.3.0
	 *
	 * @param int     $post_id Post ID.
	 * @param WP_Post $post    Post object.
	 */
	do_action( "{$new_status}_{$post->post_type}", $post->ID, $post );
}

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更新日志

Version	description
2.3.0	Introduced.

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相关函数

Uses

• wp-includes/plugin.php: do_action()
• wp-includes/post.php: transition_post_status
• wp-includes/post.php: {$old_status}_to_{$new_status}
• wp-includes/post.php: {$new_status}_{$post->post_type}

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Used By

• wp-includes/theme.php: _wp_customize_publish_changeset()
• wp-includes/post.php: wp_publish_post()
• wp-includes/post.php: wp_insert_post()

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User Contributed Notes

1. Skip to note content You must log in to vote on the helpfulness of this noteVote results for this note: 0You must log in to vote on the helpfulness of this note Contributed by Codex

   Basic Example

   The following example is based on wp_publish_post().

   
   global $wpdb;
   
   if ( ! $post = get_post( $post ) ) return;
   
   if ( 'publish' == $post->post_status ) return;
   	
   $wpdb->update( $wpdb->posts, array( 'post_status' => 'publish' ), array( 'ID' => $post->ID ) );
   
   clean_post_cache( $post->ID );
   	
   $old_status = $post->post_status;
   $post->post_status = 'publish';
   wp_transition_post_status( 'publish', $old_status, $post );