LAMP PHP 配置

Question

操作系统：Ubuntu 17.10 (Artful Aardvark)

我已经安装了 LAMP 堆栈和 Laravel，当我在 Laravel 应用程序中尝试 composer install 时，出现以下错误。

- Installation request for phar-io/manifest 1.0.1 -> satisfiable by phar-io/manifest[1.0.1].
  - phar-io/manifest 1.0.1 requires ext-dom * -> the requested PHP extension dom is missing from your system.
Problem 2
  - Installation request for phpunit/php-code-coverage 5.2.2 -> satisfiable by phpunit/php-code-coverage[5.2.2].
  - phpunit/php-code-coverage 5.2.2 requires ext-dom * -> the requested PHP extension dom is missing from your system.
Problem 3
  - Installation request for phpunit/phpunit 6.4.3 -> satisfiable by phpunit/phpunit[6.4.3].
  - phpunit/phpunit 6.4.3 requires ext-dom * -> the requested PHP extension dom is missing from your system.
Problem 4
  - Installation request for theseer/tokenizer 1.1.0 -> satisfiable by theseer/tokenizer[1.1.0].
  - theseer/tokenizer 1.1.0 requires ext-dom * -> the requested PHP extension dom is missing from your system.

To enable extensions, verify that they are enabled in your .ini files:
  - /etc/php/7.1/cli/php.ini
  - /etc/php/7.1/cli/conf.d/10-opcache.ini
  - /etc/php/7.1/cli/conf.d/10-pdo.ini
  - /etc/php/7.1/cli/conf.d/20-calendar.ini
  - /etc/php/7.1/cli/conf.d/20-ctype.ini
  - /etc/php/7.1/cli/conf.d/20-exif.ini
  - /etc/php/7.1/cli/conf.d/20-fileinfo.ini
  - /etc/php/7.1/cli/conf.d/20-ftp.ini
  - /etc/php/7.1/cli/conf.d/20-gettext.ini
  - /etc/php/7.1/cli/conf.d/20-iconv.ini
  - /etc/php/7.1/cli/conf.d/20-json.ini
  - /etc/php/7.1/cli/conf.d/20-mbstring.ini
  - /etc/php/7.1/cli/conf.d/20-pdo.ini
  - /etc/php/7.1/cli/conf.d/20-phar.ini
  - /etc/php/7.1/cli/conf.d/20-posix.ini
  - /etc/php/7.1/cli/conf.d/20-readline.ini
  - /etc/php/7.1/cli/conf.d/20-shmop.ini
  - /etc/php/7.1/cli/conf.d/20-sockets.ini
  - /etc/php/7.1/cli/conf.d/20-sysvmsg.ini
  - /etc/php/7.1/cli/conf.d/20-sysvsem.ini
  - /etc/php/7.1/cli/conf.d/20-sysvshm.ini
  - /etc/php/7.1/cli/conf.d/20-tokenizer.ini
You can also run `php --ini` inside terminal to see which files are used by PHP in CLI mode.

我重新检查了文件，所有扩展都已启用，它们位于 /usr/lib/php/20160303 文件夹。

Answer 1

正如日志所说，我们需要安装扩展“dom”。我们就是这样做的：

sudo apt install php7.1-dom

如果日志显示仅缺少一个扩展名，则上述命令有效。如果缺少其他扩展，您可以在同一行中添加这些扩展，如下所示：

sudo apt install php7.1-dom php7.1-ext-mbstring

就是这样。现在您在安装 PHP Composer 时不会遇到任何问题。输入composer install。

Answer 2

如果仍然遇到问题，请尝试

sudo apt-get install -y php7.1 php7.1-xml php7.1-mysql php7.1-curl php7.1-mbstring

Answer 3

尝试以下命令：

sudo apt-get install php-mbstring
sudo apt-get install php-xml

Answer 4

有时问题在于 php-xml 扩展。

试试：

sudo apt-get install php-xml