BP_Signup::validate( string $key = '' )

	public static function validate( $key = '' ) {
		global $wpdb;

		if ( empty( $key ) ) {
			return;
		}

		$activated = $wpdb->update(
			// Signups table.
			buddypress()->members->table_name_signups,
			array(
				'active' => 1,
				'activated' => current_time( 'mysql', true ),
			),
			array(
				'activation_key' => $key,
			),
			// Data sanitization format.
			array(
				'%d',
				'%s',
			),
			// WHERE sanitization format.
			array(
				'%s',
			)
		);

		/**
		 * Filters the status of the activated user.
		 *
		 * @since BuddyPress 2.0.0
		 *
		 * @param bool $activated Whether or not the activation was successful.
		 */
		return apply_filters( 'bp_core_signups_validate', $activated );
	}