update_comment_cache( WP_Comment[] $comments, bool $update_meta_cache = true )

Updates the comment cache of given comments.

Description Description

Will add the comments in $comments to the cache. If comment ID already exists in the comment cache then it will not be updated. The comment is added to the cache using the comment group with the key using the ID of the comments.

Parameters Parameters


(WP_Comment[]) (Required) Array of comment objects


(bool) (Optional) Whether to update commentmeta cache.

Default value: true

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Source Source

File: wp-includes/comment.php

function update_comment_cache( $comments, $update_meta_cache = true ) {
	foreach ( (array) $comments as $comment ) {
		wp_cache_add( $comment->comment_ID, $comment, 'comment' );

	if ( $update_meta_cache ) {
		// Avoid `wp_list_pluck()` in case `$comments` is passed by reference.
		$comment_ids = array();
		foreach ( $comments as $comment ) {
			$comment_ids[] = $comment->comment_ID;
		update_meta_cache( 'comment', $comment_ids );

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Changelog Changelog

Version Description
4.4.0 Introduced the $update_meta_cache parameter.
2.3.0 Introduced.

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