bp_has_members( array|string $args = array() )

function bp_has_members( $args = array() ) {
	global $members_template;

	// Default user ID.
	$user_id = 0;

	// User filtering.
	if ( bp_is_user_friends() && ! bp_is_user_friend_requests() && ! bp_is_user_mutual_friends() ) {
		$user_id = bp_displayed_user_id();
	}

	$include = false;
	$type = 'active';

	// Mutual User filtering.
	if ( isset( $args['type'] ) && 'online' != $args['type'] && bp_is_user_friends() && bp_is_user_mutual_friends() ) {
		$include = bp_get_mutual_friendships();
		$type = 'alphabetical';
	}

	$member_type = bp_get_current_member_type();
	if ( ! $member_type && ! empty( $_GET['member_type'] ) ) {
		if ( is_array( $_GET['member_type'] ) ) {
			$member_type = $_GET['member_type'];
		} else {
			// Can be a comma-separated list.
			$member_type = explode( ',', $_GET['member_type'] );
		}
	}

	$search_terms_default = null;
	$search_query_arg = bp_core_get_component_search_query_arg( 'members' );
	if ( ! empty( $_REQUEST[ $search_query_arg ] ) ) {
		$search_terms_default = stripslashes( $_REQUEST[ $search_query_arg ] );
	}

	// Type: active ( default ) | random | newest | popular | online | alphabetical.
	$r = bp_parse_args( $args, array(
		'type'                => $type,
		'page'                => 1,
		'per_page'            => 20,
		'max'                 => false,

		'page_arg'            => 'upage',  // See https://buddypress.trac.wordpress.org/ticket/3679.

		'include'             => $include,    // Pass a user_id or a list (comma-separated or array) of user_ids to only show these users.
		'exclude'             => false,    // Pass a user_id or a list (comma-separated or array) of user_ids to exclude these users.

		'user_id'             => $user_id, // Pass a user_id to only show friends of this user.
		'member_type'         => $member_type,
		'member_type__in'     => '',
		'member_type__not_in' => '',
		'search_terms'        => $search_terms_default,

		'meta_key'            => false,    // Only return users with this usermeta.
		'meta_value'          => false,    // Only return users where the usermeta value matches. Requires meta_key.

		'populate_extras'     => true      // Fetch usermeta? Connection count, last active etc.
	), 'has_members' );

	// Pass a filter if ?s= is set.
	if ( is_null( $r['search_terms'] ) ) {
		if ( !empty( $_REQUEST['s'] ) ) {
			$r['search_terms'] = $_REQUEST['s'];
		} else {
			$r['search_terms'] = false;
		}
	}

	// Set per_page to max if max is larger than per_page.
	if ( !empty( $r['max'] ) && ( $r['per_page'] > $r['max'] ) ) {
		$r['per_page'] = $r['max'];
	}

	// Query for members and populate $members_template global.
	$members_template = new BP_Core_Members_Template(
		$r['type'],
		$r['page'],
		$r['per_page'],
		$r['max'],
		$r['user_id'],
		$r['search_terms'],
		$r['include'],
		$r['populate_extras'],
		$r['exclude'],
		$r['meta_key'],
		$r['meta_value'],
		$r['page_arg'],
		$r['member_type'],
		$r['member_type__in'],
		$r['member_type__not_in']
	);

	/**
	 * Filters whether or not BuddyPress has members to iterate over.
	 *
	 * @since BuddyPress 1.2.4
	 * @since BuddyPress 2.6.0 Added the `$r` parameter
	 *
	 * @param bool  $value            Whether or not there are members to iterate over.
	 * @param array $members_template Populated $members_template global.
	 * @param array $r                Array of arguments passed into the BP_Core_Members_Template class.
	 */
	return apply_filters( 'bp_has_members', $members_template->has_members(), $members_template, $r );
}