您的系统缺少所需的PHP扩展名dom

因此，我刚刚安装了Scotchbox（无业游民的安装程序）。https://github.com/scotch-io/scotch-box

当出现以下错误时，我正在尝试安装composer依赖项。

Problem 1
- phpunit/php-code-coverage 4.0.8 requires ext-dom * -> the requested PHP extension dom is missing from your system.
- phpunit/php-code-coverage 4.0.8 requires ext-dom * -> the requested PHP extension dom is missing from your system.
- phpunit/php-code-coverage 4.0.8 requires ext-dom * -> the requested PHP extension dom is missing from your system.
- Installation request for phpunit/php-code-coverage (locked at 4.0.8) -> satisfiable by phpunit/php-code-coverage[4.0.8].

我尝试过的

其他一些线程建议将其包含在php-xml包中。我尝试安装这样做

sudo apt-get install php7.0-xml
sudo service apache2 restart

但这没有用。知道其他什么解决方案可能有效吗？我开始拔头发。