Error Installing Laravel 5.3

Posted 2 years ago by fsdolphin

I get the following error when I try to install Laravel via laravel new blog. I installed PHP7 but still no luck.

Error:

    Crafting application...
    Cannot create cache directory /home/superserver/.composer/cache/repo/https---packagist.org/, or dire                                    ctory is not writable. Proceeding without cache
    Cannot create cache directory /home/superserver/.composer/cache/files/, or directory is not writable                                    . Proceeding without cache
    Cannot create cache directory /home/superserver/.composer/cache/repo/https---packagist.org/, or dire                                    ctory is not writable. Proceeding without cache
    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
 - Installation request for laravel/framework v5.3.18 -> satisfiable by laravel/framework[v5.3.18                                    ].
 - laravel/framework v5.3.18 requires ext-mbstring * -> the requested PHP extension mbstring is m                                    issing from your system.
Problem 2
    - Installation request for phpunit/phpunit 5.6.1 -> satisfiable by phpunit/phpunit[5.6.1].
 - phpunit/phpunit 5.6.1 requires ext-dom * -> the requested PHP extension dom is missing from yo                                    ur system.

 To enable extensions, verify that they are enabled in those .ini files:
    - /etc/php/7.0/cli/php.ini
    - /etc/php/7.0/cli/conf.d/10-mysqlnd.ini

This is what I get when I check PHP vesion.

php -v

PHP 7.0.12-1+deb.sury.org~trusty+1 (cli) ( NTS ) Copyright (c) 1997-2016 The PHP Group Zend Engine v3.0.0, Copyright (c) 1998-2016 Zend Technologies with Zend OPcache v7.0.12-1+deb.sury.org~trusty+1, Copyright (c) 1999-2016, by Zend Technologies

Any idea what could be wrong?

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