bp_get_member_class( array $classes = array() )

	function bp_get_member_class( $classes = array() ) {
		global $members_template;

		// Add even/odd classes, but only if there's more than 1 member.
		if ( $members_template->member_count > 1 ) {
			$pos_in_loop = (int) $members_template->current_member;
			$classes[]   = ( $pos_in_loop % 2 ) ? 'even' : 'odd';

			// If we've only one member in the loop, don't bother with odd and even.
		} else {
			$classes[] = 'bp-single-member';
		}

		// Maybe add 'is-online' class.
		if ( ! empty( $members_template->member->last_activity ) ) {

			// Calculate some times.
			$current_time  = bp_core_current_time( true, 'timestamp' );
			$last_activity = strtotime( $members_template->member->last_activity );
			$still_online  = strtotime( '+5 minutes', $last_activity );

			// Has the user been active recently?
			if ( $current_time <= $still_online ) {
				$classes[] = 'is-online';
			}
		}

		// Add current user class.
		if ( bp_loggedin_user_id() === (int) $members_template->member->id ) {
			$classes[] = 'is-current-user';
		}

		// Add current user profile types.
		if ( $member_types = bp_get_member_type( $members_template->member->id, false ) ) {
			foreach ( $member_types as $member_type ) {
				$classes[] = sprintf( 'member-type-%s', esc_attr( $member_type ) );
			}
		}

		/**
		 * Filters the determined classes to add to the HTML element.
		 *
		 * @since BuddyPress 1.7.0
		 *
		 * @param string $classes Classes to be added to the HTML element.
		 */
		$classes = apply_filters( 'bp_get_member_class', $classes );
		$classes = array_merge( $classes, array() );
		$retval  = 'class="' . join( ' ', $classes ) . '"';

		return $retval;
	}