woothemes / woocommerce

		$key = preg_replace( '/[^a-z0-9]/i', '', $key );

		if ( empty( $key ) || ! is_string( $key ) ) {

			wc_add_notice( __( 'Invalid key', 'woocommerce' ), 'error' );

			return false;

		}

		if ( empty( $login ) || ! is_string( $login ) ) {

			wc_add_notice( __( 'Invalid key', 'woocommerce' ), 'error' );

			return false;

		}

		if ( empty( $login ) || ! is_string( $login ) ) {

			wc_add_notice( __( 'Invalid key', 'woocommerce' ), 'error' );

			return false;

		}

		$user = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->users WHERE user_login = %s", $login ) );

			$valid = $wp_hasher->CheckPassword( $key, $user->user_activation_key );

		}

		if ( empty( $user ) || empty( $valid ) ) {

			wc_add_notice( __( 'Invalid key', 'woocommerce' ), 'error' );

			return false;

		}

		return get_userdata( $user->ID );

	}