Während der Installation Laravel 5.4 mit PHP 5.6

Question

Ich bin mit diesem Problem konfrontiert mit, während der Installation Laravel 5.4 mit PHP 7

Ihre Anforderungen nicht zu einem installierbaren Satz von Paketen aufgelöst werden können, verwendet wird.

Problem 1 - phpunit/phpunit 5.5.5 erfordert ext-dom * -> die angeforderte PHP-Erweiterung dom fehlt in Ihrem System.

- phpunit/phpunit 5.5.4 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.5.3 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.5.2 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.5.1 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.5.0 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.4.8 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.4.7 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.4.6 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.4.5 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.4.4 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.4.3 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.4.2 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.4.1 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.4.0 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.3.5 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.3.4 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.3.3 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.3.2 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.3.1 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.3.0 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.2.9 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.2.8 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.2.7 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.2.6 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.2.5 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.2.4 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.2.3 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.2.2 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.2.12 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.2.11 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.2.10 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.2.1 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.2.0 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.1.7 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.1.6 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.1.5 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.1.4 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.1.3 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.1.2 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.1.1 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.1.0 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.0.9 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.0.8 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.0.7 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.0.6 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.0.5 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.0.4 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.0.3 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.0.2 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.0.10 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.0.1 requires ext-dom * -> the requested PHP extension dom is missing from your system. 
- phpunit/phpunit 5.0.0 requires ext-dom * -> the requested PHP extension dom is missing from your system. 

- Installation request for phpunit/phpunit ~5.0 -> satisfiable by phpunit/phpunit[5.0.0, 5.0.1, 5.0.10, 5.0.2, 5.0.3, 5.0.4, 5.0.5, 5.0.6, 5.0.7, 5.0.8, 5.0.9, 5.1.0, 5.1.1, 5.1.2, 5.1.3, 5.1.4, 5.1.5, 5.1.6, 5.1.7, 5.2.0, 5.2.1, 5.2.10, 5.2.11, 5.2.12, 5.2.2, 5.2.3, 5.2.4, 5.2.5, 5.2.6, 5.2.7, 5.2.8, 5.2.9, 5.3.0, 5.3.1, 5.3.2, 5.3.3, 5.3.4, 5.3.5, 5.4.0, 5.4.1, 5.4.2, 5.4.3, 5.4.4, 5.4.5, 5.4.6, 5.4.7, 5.4.8, 5.5.0, 5.5.1, 5.5.2, 5.5.3, 5.5.4, 5.5.5]. 

Erweiterungen zu aktivieren, stellen Sie sicher, dass sie in den INI-Dateien aktiviert sind:

- /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 

Sie auch php --ini innerhalb Terminal laufen, um zu sehen, welche Dateien von PHP im CLI-Modus verwendet werden.

sudo apt-get install yum (Sie müssen php dom Erweiterung installieren) noch das Problem noch nicht fest, tun dies sudo:

Answer 1

dieses Problem zu beheben, habe ich einige Installation gemacht apt-get install php-xml