centos7+php7+docker安装php bcmath扩展

1，docker ps 查看容器ID

2，docker exec -it ed7887365139 /bin/bash 进入容器

3，cd /usr/local/etc/php 查看php配置文件：cat php.ini

4，查看扩展

/usr/local/etc/php/conf.d# ls
docker-php-ext-gd.ini        docker-php-ext-mcrypt.ini  docker-php-ext-pdo_mysql.ini  docker-php-ext-sockets.ini
docker-php-ext-mbstring.ini  docker-php-ext-mysqli.ini  docker-php-ext-redis.ini      docker-php-ext-zip.ini

5，复制文件：cp /usr/src/php/ext/gmp/php_gmp.h /usr/include

6，安装 bcmath 扩展：docker-php-ext-install bcmath

7，安装扩展后需要重启 apache 生效：/etc/init.d/apache2 restart