bbp_get_topic_subscribers( int $topic_id )

Get the users who have subscribed to the topic

Description

Parameters

$topic_id

(int) (Optional) Topic id

Return

(array|bool) Results if the topic has any subscribers, otherwise false

Source

File: bp-forums/users/functions.php

function bbp_get_topic_subscribers( $topic_id = 0 ) {
	$topic_id = bbp_get_topic_id( $topic_id );
	if ( empty( $topic_id ) )
		return;

	global $wpdb;

	$key   = $wpdb->prefix . '_bbp_subscriptions';
	$users = wp_cache_get( 'bbp_get_topic_subscribers_' . $topic_id, 'bbpress_users' );
	if ( false === $users ) {
		$users = $wpdb->get_col( "SELECT user_id FROM {$wpdb->usermeta} WHERE meta_key = '{$key}' and FIND_IN_SET('{$topic_id}', meta_value) > 0" );
		wp_cache_set( 'bbp_get_topic_subscribers_' . $topic_id, $users, 'bbpress_users' );
	}

	return apply_filters( 'bbp_get_topic_subscribers', $users );
}

Changelog

Changelog
Version Description
bbPress (r2668) Introduced.

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