update_post_thumbnail_cache( WP_Query $wp_query = null )

Update cache for thumbnails in the current loop.

Parameters

$wp_query

(Optional) A WP_Query instance. Defaults to the $wp_query global.

Default value: null

Source

File: wp-includes/post-thumbnail-template.php 

function update_post_thumbnail_cache( $wp_query = null ) {
	if ( ! $wp_query )
		$wp_query = $GLOBALS['wp_query'];

	if ( $wp_query->thumbnails_cached )
		return;

	$thumb_ids = array();
	foreach ( $wp_query->posts as $post ) {
		if ( $id = get_post_thumbnail_id( $post->ID ) )
			$thumb_ids[] = $id;
	}

	if ( ! empty ( $thumb_ids ) ) {
		_prime_post_caches( $thumb_ids, false, true );
	}

	$wp_query->thumbnails_cached = true;
}

Expand Source Code View on GitHub

Related

Uses

Uses
Uses Description
wp-includes/post-thumbnail-template.php: get_post_thumbnail_id()

Retrieve post thumbnail ID.
wp-includes/post.php: _prime_post_caches()

Adds any posts from the given ids to the cache that do not already exist in cache

Used By

Used By
Used By Description
wp-includes/post-thumbnail-template.php: get_the_post_thumbnail()

Retrieve the post thumbnail.

Changelog

Changelog
Version Description
WP-3.2.0 Introduced.