无法在ubuntu 16.04上安装php7.1-bcmath

Question

当我运行以下命令：composer require sonata-project/notification-bundle时，出现以下错误：

- php-amqplib/php-amqplib v2.7.2 requires ext-bcmath * -> the requested PHP extension bcmath is missing from your system.
    - php-amqplib/php-amqplib v2.7.1 requires ext-bcmath * -> the requested PHP extension bcmath is missing from your system.
    - php-amqplib/php-amqplib v2.7.0 requires ext-bcmath * -> the requested PHP extension bcmath is missing from your system.
    - sonata-project/notification-bundle 3.4.0 requires enqueue/amqp-lib ^0.8 -> satisfiable by enqueue/amqp-lib[0.8.0, 0.8.10, 0.8.11, 0.8.12, 0.8.13, 0.8.15, 0.8.2, 0.8.21, 0.8.23, 0.8.4, 0.8.5, 0.8.9].

显然，bcmath丢失了，所以我运行了以下命令：

sudo apt-get install php7.1-bcmath

我得到了下面的错误：

E: Unable to locate package php7.1-bcmath
E: Couldn't find any package by glob 'php7.1-bcmath'
E: Couldn't find any package by regex 'php7.1-bcmath'

你知道是什么导致了这个问题吗？

Symfony 4 php 7.1 Ubuntu 16.04

Answer 1

sudo apt-get install software-properties-common
sudo add-apt-repository ppa:ondrej/php
sudo apt-get update
sudo apt install php7.1-bcmath