CentOS 7 使用composer install 报错phpunit/phpunit 4.8.35 requires ext-dom *

问题:

[root@localhost laravel_demo]# composer install

Loading composer repositories with package information
Installing dependencies (including require-dev) from lock file
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - phpunit/phpunit 4.8.35 requires ext-dom * -> the requested PHP extension dom is missing from your system.
    - phpunit/phpunit 4.8.35 requires ext-dom * -> the requested PHP extension dom is missing from your system.
    - Installation request for phpunit/phpunit 4.8.35 -> satisfiable by phpunit/phpunit[4.8.35].

  To enable extensions, verify that they are enabled in your .ini files:
    - /etc/php.ini
    - /etc/php.d/bz2.ini
    - /etc/php.d/calendar.ini
    - /etc/php.d/ctype.ini
    - /etc/php.d/curl.ini
    - /etc/php.d/exif.ini
    - /etc/php.d/fileinfo.ini
    - /etc/php.d/ftp.ini
    - /etc/php.d/gd.ini
    - /etc/php.d/gettext.ini
    - /etc/php.d/gmp.ini
    - /etc/php.d/iconv.ini
    - /etc/php.d/json.ini
    - /etc/php.d/ldap.ini
    - /etc/php.d/mbstring.ini
    - /etc/php.d/mcrypt.ini
    - /etc/php.d/mysqli.ini
    - /etc/php.d/pdo.ini
    - /etc/php.d/pdo_mysql.ini
    - /etc/php.d/pdo_sqlite.ini
    - /etc/php.d/phar.ini
    - /etc/php.d/shmop.ini
    - /etc/php.d/simplexml.ini
    - /etc/php.d/sockets.ini
    - /etc/php.d/sqlite3.ini
    - /etc/php.d/tokenizer.ini
    - /etc/php.d/xml.ini
    - /etc/php.d/zip.ini

  You can also run `php --ini` inside terminal to see which files are used by PHP in CLI mode.

解决:

[root@localhost ~]# yum search php70w    查询可供安装的包

[root@localhost ~]# yum -y install php70w-xml.x86_64

[root@localhost ~]# systemctl restart httpd.service 重启apache

测试:

[root@localhost ~]# systemctl restart httpd.service
[root@localhost ~]# cd /home/www/laravel_demo/
[root@localhost laravel_demo]# composer install
Loading composer repositories with package information
Installing dependencies (including require-dev) from lock file
Package operations: 0 installs, 2 updates, 0 removals
  - Updating symfony/event-dispatcher (v3.2.4 => v3.2.3): Downloading (100%)
  - Updating symfony/yaml (v3.2.4 => v3.2.3): Downloading (100%)
Generating autoload files
> Illuminate\Foundation\ComposerScripts::postInstall
> php artisan optimize
Generating optimized class loader