composer install 出现的问题

今天克隆代码之后，在composer install 的时候出现了一些问题，在此记录一下。

错误代码如下：

[root@localhost MarketingCenter]# composer install
Loading composer repositories with package information
Installing dependencies (including require-dev) from lock file
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - Installation request for php-amqplib/php-amqplib v2.7.0 -> satisfiable by php-amqplib/php-amqplib[v2.7.0].
    - php-amqplib/php-amqplib v2.7.0 requires ext-bcmath * -> the requested PHP extension bcmath is missing from your system.
  Problem 2
    - php-amqplib/php-amqplib v2.7.0 requires ext-bcmath * -> the requested PHP extension bcmath is missing from your system.
    - php-amqplib/thumper v0.5.0 requires php-amqplib/php-amqplib ^2.6 -> satisfiable by php-amqplib/php-amqplib[v2.7.0].
    - Installation request for php-amqplib/thumper v0.5.0 -> satisfiable by php-amqplib/thumper[v0.5.0].

  To enable extensions, verify that they are enabled in your .ini files:
    - /etc/php.ini
    - /etc/php.d/curl.ini
    - /etc/php.d/fileinfo.ini
    - /etc/php.d/json.ini
    - /etc/php.d/phar.ini
    - /etc/php.d/zip.ini
  You can also run `php --ini` inside terminal to see which files are used by PHP in CLI mode.

　　由此可见 要给php 增加扩展 ext-bcmath

　　1、进入如下目录　　

cd /usr/local/php/lib

　　2、然后执行如下代码

yum install php-bcmath

　　即可安装成功，

　　由上图问题还需要继续安装mbstring

yum install php-mbstring

　　回车即可安装成功，

　　最后解决了问题，在继续composer install，好了操作完成！