Question

wp_check_for_changed_slugs( int $post_id,  WP_Post $post,  WP_Post $post_before )

Check for changed slugs for published post objects and save the old slug.

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description

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

If the slug was changed and not already part of the old slugs then it will be added to the post meta field (‘_wp_old_slug’) for storing old slugs 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.

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参数

$post_id

(int) (Required) Post ID.

$post

(WP_Post) (Required) The Post Object

$post_before

(WP_Post) (Required) The Previous Post Object

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源代码

File: wp-includes/post.php

function wp_check_for_changed_slugs( $post_id, $post, $post_before ) {
	// Don't bother if it hasn't changed.
	if ( $post->post_name == $post_before->post_name ) {
		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_slugs = (array) get_post_meta( $post_id, '_wp_old_slug' );

	// If we haven't added this old slug before, add it now.
	if ( ! empty( $post_before->post_name ) && ! in_array( $post_before->post_name, $old_slugs ) ) {
		add_post_meta( $post_id, '_wp_old_slug', $post_before->post_name );
	}

	// If the new slug was used previously, delete it from the list.
	if ( in_array( $post->post_name, $old_slugs ) ) {
		delete_post_meta( $post_id, '_wp_old_slug', $post->post_name );
	}
}

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更新日志

Version	description
2.1.0	Introduced.

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相关函数

Uses

• wp-includes/post.php: get_post_meta()
• wp-includes/post.php: add_post_meta()
• wp-includes/post.php: delete_post_meta()
• wp-includes/post.php: get_post_type()
• wp-includes/post.php: is_post_type_hierarchical()

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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 nothin7

   Typo: “The most logically usage”