_set_preview( WP_Post $post )

This function’s access is marked private. This means it is not intended for use by plugin or theme developers, only in other core functions. It is listed here for completeness.

Sets up the post object for preview based on the post autosave.

Parameters

$post

(WP_Post) (Required)

Return

(WP_Post|false)

Source

File: wp-includes/revision.php 

function _set_preview( $post ) {
	if ( ! is_object( $post ) ) {
		return $post;
	}

	$preview = wp_get_post_autosave( $post->ID );
	if ( ! is_object( $preview ) ) {
		return $post;
	}

	$preview = sanitize_post( $preview );

	$post->post_content = $preview->post_content;
	$post->post_title   = $preview->post_title;
	$post->post_excerpt = $preview->post_excerpt;

	add_filter( 'get_the_terms', '_wp_preview_terms_filter', 10, 3 );
	add_filter( 'get_post_metadata', '_wp_preview_post_thumbnail_filter', 10, 3 );

	return $post;
}

Uses

Uses Description
wp-includes/plugin.php: add_filter()

Adds a callback function to a filter hook.
wp-includes/post.php: sanitize_post()

Sanitizes every post field.
wp-includes/revision.php: wp_get_post_autosave()

Retrieve the autosaved data of the specified post.

Changelog

Version Description
2.7.0 Introduced.

© 2003–2021 WordPress Foundation
Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/functions/_set_preview