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update_post_meta

February 12, 2011 by Thorsten 0 Comments

Definition:
function update_post_meta($post_id, $meta_key, $meta_value, $prev_value = '') {}

Update post meta field based on post ID.
Use the $prev_value parameter to differentiate between meta fields with the same key and post ID.

Parameters

  • int $post_id: Post ID.
  • string $meta_key: Metadata key.
  • mixed $meta_value: Metadata value.
  • mixed $prev_value: Optional. Previous value to check before removing.

Return values

returns:False on failure, true if success.

Source code

function update_post_meta($post_id, $meta_key, $meta_value, $prev_value = '') {

	// make sure meta is added to the post, not a revision

	if ( $the_post = wp_is_post_revision($post_id) )

		$post_id = $the_post;



	return update_metadata('post', $post_id, $meta_key, $meta_value, $prev_value);

}

3199

/wp-includes/post.php, Documentation, Files, Functions, Functions by letter u
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update_post_caches

February 12, 2011 by Thorsten 0 Comments

Definition:
function update_post_caches(&$posts, $post_type = 'post', $update_term_cache = true, $update_meta_cache = true) {}

Call major cache updating functions for list of Post objects.

Parameters

  • array $posts: Array of Post objects
  • string $post_type: The post type of the posts in $posts. Default is ‘post’.
  • bool $update_term_cache: Whether to update the term cache. Default is true.
  • bool $update_meta_cache: Whether to update the meta cache. Default is true.
  • &$posts

Source code

function update_post_caches(&$posts, $post_type = 'post', $update_term_cache = true, $update_meta_cache = true) {

	// No point in doing all this work if we didn't match any posts.

	if ( !$posts )

		return;



	update_post_cache($posts);



	$post_ids = array();

	foreach ( $posts as $post )

		$post_ids[] = $post->ID;



	if ( empty($post_type) )

		$post_type = 'post';



	if ( $update_term_cache ) {

		if ( is_array($post_type) ) {

			$ptypes = $post_type;

		} elseif ( 'any' == $post_type ) {

			// Just use the post_types in the supplied posts.

			foreach ( $posts as $post )

				$ptypes[] = $post->post_type;

			$ptypes = array_unique($ptypes);

		} else {

			$ptypes = array($post_type);

		}



		if ( ! empty($ptypes) )

			update_object_term_cache($post_ids, $ptypes);

	}



	if ( $update_meta_cache )

		update_postmeta_cache($post_ids);

}

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/wp-includes/post.php, Documentation, Files, Functions, Functions by letter u
,

update_post_cache

February 12, 2011 by Thorsten 0 Comments

Definition:
function update_post_cache(&$posts) {}

Updates posts in cache.

Parameters

  • array $posts: Array of post objects
  • &$posts

Source code

function update_post_cache(&$posts) {

	if ( !$posts )

		return;



	foreach ( $posts as $post )

		wp_cache_add($post->ID, $post, 'posts');

}

3195

/wp-includes/post.php, Documentation, Files, Functions, Functions by letter u
,

update_posts_count

February 12, 2011 by Thorsten 0 Comments

Definition:
function update_posts_count( $deprecated = '' ) {}

Update a blog’s post count.
WordPress MS stores a blog’s post count as an option so as to avoid extraneous COUNTs when a blog’s details are fetched with get_blog_details(). This function is called when posts are published to make sure the count stays current.

Parameters

  • $deprecated

Source code

function update_posts_count( $deprecated = '' ) {

	global $wpdb;

	update_option( 'post_count', (int) $wpdb->get_var( "SELECT COUNT(ID) FROM {$wpdb->posts} WHERE post_status = 'publish' and post_type = 'post'" ) );

3193

/wp-includes/ms-functions.php, Documentation, Files, Functions, Functions by letter u
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update_postmeta_cache

February 12, 2011 by Thorsten 0 Comments

Definition:
function update_postmeta_cache($post_ids) {}

Updates metadata cache for list of post IDs.
Performs SQL query to retrieve the metadata for the post IDs and updates the metadata cache for the posts. Therefore, the functions, which call this function, do not need to perform SQL queries on their own.

Parameters

  • array $post_ids: List of post IDs.

Return values

returns:Returns false if there is nothing to update or an array of metadata.

Source code

function update_postmeta_cache($post_ids) {

	return update_meta_cache('post', $post_ids);

}

3191

/wp-includes/post.php, Documentation, Files, Functions, Functions by letter u
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