使用magento2 Composer安装 - php扩展：ext-mcrypt *和ext-intl *缺失

Question

我试过在ubuntu 16.04机器上安装magento2。我已按照these步骤安装magento。当安装composer然后显示这些问题

 Problem 1
    - The requested PHP extension ext-gd * is missing from your system. Install or enable PHP's gd extension.
 Problem 2
    - The requested PHP extension ext-mcrypt * is missing from your system. Install or enable PHP's mcrypt extension.

如何解决这些问题？

Answer 1

在shell中尝试这些命令

sudo apt-get install php7.0-gd
sudo apt-get install php7.0-ext-mcrypt

然后再次尝试安装composer

composer install