Installing symfony/website-skeleton (v3.4.27.2)
  - Installing symfony/website-skeleton (v3.4.27.2): Downloading (100%)
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Installing dependencies (including require-dev) from lock file
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  Problem 1
    - Installation request for symfony/framework-bundle v3.4.27 -> satisfiable by symfony/framework-bundle[v3.4.27].
    - symfony/framework-bundle v3.4.27 requires ext-xml * -> the requested PHP extension xml is missing from your system.
  Problem 2
    - Installation request for symfony/security-bundle v3.4.27 -> satisfiable by symfony/security-bundle[v3.4.27].
    - symfony/security-bundle v3.4.27 requires ext-xml * -> the requested PHP extension xml is missing from your system.
  Problem 3
    - Installation request for symfony/debug-bundle v3.4.27 -> satisfiable by symfony/debug-bundle[v3.4.27].
    - symfony/debug-bundle v3.4.27 requires ext-xml * -> the requested PHP extension xml is missing from your system.
  Problem 4
    - symfony/framework-bundle v3.4.27 requires ext-xml * -> the requested PHP extension xml is missing from your system.
    - symfony/maker-bundle v1.11.6 requires symfony/framework-bundle ^3.4|^4.0 -> satisfiable by symfony/framework-bundle[v3.4.27].
    - Installation request for symfony/maker-bundle v1.11.6 -> satisfiable by symfony/maker-bundle[v1.11.6].

  To enable extensions, verify that they are enabled in your .ini files:
    - /etc/php/7.0/cli/php.ini
    - /etc/php/7.0/cli/conf.d/10-mysqlnd.ini
    - /etc/php/7.0/cli/conf.d/10-opcache.ini
    - /etc/php/7.0/cli/conf.d/10-pdo.ini
    - /etc/php/7.0/cli/conf.d/20-calendar.ini
    - /etc/php/7.0/cli/conf.d/20-ctype.ini
    - /etc/php/7.0/cli/conf.d/20-exif.ini
    - /etc/php/7.0/cli/conf.d/20-fileinfo.ini
    - /etc/php/7.0/cli/conf.d/20-ftp.ini
    - /etc/php/7.0/cli/conf.d/20-gettext.ini
    - /etc/php/7.0/cli/conf.d/20-iconv.ini
    - /etc/php/7.0/cli/conf.d/20-json.ini
    - /etc/php/7.0/cli/conf.d/20-mbstring.ini
    - /etc/php/7.0/cli/conf.d/20-mysqli.ini
    - /etc/php/7.0/cli/conf.d/20-pdo_mysql.ini
    - /etc/php/7.0/cli/conf.d/20-phar.ini
    - /etc/php/7.0/cli/conf.d/20-posix.ini
    - /etc/php/7.0/cli/conf.d/20-readline.ini
    - /etc/php/7.0/cli/conf.d/20-shmop.ini
    - /etc/php/7.0/cli/conf.d/20-sockets.ini
    - /etc/php/7.0/cli/conf.d/20-sysvmsg.ini
    - /etc/php/7.0/cli/conf.d/20-sysvsem.ini
    - /etc/php/7.0/cli/conf.d/20-sysvshm.ini
    - /etc/php/7.0/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.