update_comment_meta()WP 2.9.0

Update comment meta field based on comment ID.

Use the $prev_value parameter to differentiate between meta fields with the same key and comment ID.

If the meta field for the comment does not exist, it will be added.

No Hooks.


Int|true|false. Meta ID if the key didn't exist, true on successful update, false on failure or if the value passed to the function is the same as the one that is already in the database.


update_comment_meta( $comment_id, $meta_key, $meta_value, $prev_value );
$comment_id(int) (required)
Comment ID.
$meta_key(string) (required)
Metadata key.
$meta_value(mixed) (required)
Metadata value. Must be serializable if non-scalar.
Previous value to check before updating. If specified, only update existing metadata entries with this value. Otherwise, update all entries.
Default: empty string



#1 Update the metadata of comment 3416:

update_comment_meta( 3416, 'my_key', 'Brad' );

Now use function get_comment_meta() to get comment metadata:

$value = get_comment_meta( 3416, 'my_key', true );

echo $value; //> Brad


Since 2.9.0 Introduced.

update_comment_meta() code WP 6.5.2

function update_comment_meta( $comment_id, $meta_key, $meta_value, $prev_value = '' ) {
	return update_metadata( 'comment', $comment_id, $meta_key, $meta_value, $prev_value );