Symfony 3 Composer ，缺少 ext-dom 和 ext-xml

Question

这个问题已经有答案了:

PHPUnit working in IDE, but server says class not found (2 个回答)

已关闭 6 年前。

我正在运行 Linux Mint 18.1。我的 IDE 是 PhpStorm，我正在尝试通过 Composer 安装 PHPUnit。我按照 https://getcomposer.org/download/ 的安装步骤进行操作.

Problem 1 - Installation request for phpunit/phpunit 6.4.x-dev -> satisfiable by phpunit/phpunit[6.4.x-dev]. - phpunit/phpunit 6.4.x-dev requires ext-dom * -> the requested PHP extension dom is missing from your system.
Problem 2 - symfony/symfony v3.3.6 requires ext-xml * -> the requested PHP extension xml is missing from your system. - symfony/symfony v3.3.6 requires ext-xml * -> the requested PHP extension xml is missing from your system. - symfony/symfony v3.3.6 requires ext-xml * -> the requested PHP extension xml is missing from your system. - Installation request for symfony/symfony (locked at v3.3.6, required as 3.3.*) -> satisfiable by symfony/symfony[v3.3.6].

我尝试过的解决方案:

• 安装 php-xml
• 安装php7.0-xml
• This answer表示检查您的任何 php.ini 文件中是否启用了“extension=dom.so”。它甚至不存在于我的文件中

有什么建议吗？非常感谢!

Answer 1

您需要从 Debian 终端安装的是:

sudo apt-get install php-xml

或者，如果您使用的是 PHP 7:

 sudo apt-get install php7.0-xml