RuntimeException: The bcmath extension is required by NumberFormatter. in CommerceGuys\Intl\Formatter\NumberFormatter->__construct() (line 113 of /var/www/html/vendor/commerceguys/intl/src/Formatter/NumberFormatter.php).

修复办法：
https://github.com/kalabox/kalabox/issues/1655

docker-php-ext-install bcmath  
docker-php-enable bcmath  

docker-php-ext-enable bcmath

在编辑 Linux/MAC 的环境变量($PATH)文件.bash_profile或者.profile
到后导致-bash: ** : command not found
解决办法：
export PATH=/usr/bin:/usr/local/bin:/usr/local/sbin:/usr/sbin:/bin:/sbin

查看PATH echo $PATH
使用命令行添加 PATH，例如添加~/opt/bin
export PATH=$PATH:~/opt/bin
使用编辑器编辑你的$PATH
vim .bash_profile
或者vim .profile
vim /etc/paths
$PATH 使用:作为分割符号