在Ubuntu中创建Laravel应用程序时出错

Question

我正在使用Ubuntu 17.04。 我试图访问和/etc/php/7.0/cli和编辑的php.ini文件。 但是无论如何都没有帮助。 如何启用以下扩展。

ninja@ninja:~/Documents/lartest$ laravel new demo

    Crafting application...
    Cannot create cache directory /home/ninja/.composer/cache/repo/https---packagist.org/, or directory is not writable. Proceeding without cache
    Cannot create cache directory /home/ninja/.composer/cache/files/, or directory is not writable. Proceeding without cache
    Cannot create cache directory /home/ninja/.composer/cache/repo/https---packagist.org/, or directory 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 phpunit/php-code-coverage 4.0.8 -> satisfiable by phpunit/php-code-coverage[4.0.8].
        - phpunit/php-code-coverage 4.0.8 requires ext-dom * -> the requested PHP extension dom is missing from your system.
      Problem 2
        - Installation request for phpunit/phpunit 5.7.21 -> satisfiable by phpunit/phpunit[5.7.21].
        - phpunit/phpunit 5.7.21 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/7.0/cli/php.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-curl.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-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
        - /etc/php/7.0/cli/conf.d/20-zip.ini
      You can also run `php --ini` inside terminal to see which files are used by PHP in CLI mode.
    Application ready! Build something amazing.

---

执行服务命令时也出现错误

 ninja@ninja:~/Documents/lartest/demo$ php artisan serve PHP Warning: require(/home/ninja/Documents/lartest/demo/bootstrap/../vendor/autoload.php): failed to open stream: No such file or directory in /home/ninja/Documents/lartest/demo/bootstrap/autoload.php on line 17 PHP Fatal error: require(): Failed opening required '/home/ninja/Documents/lartest/demo/bootstrap/../vendor/autoload.php' (include_path='.:/usr/share/php') in /home/ninja/Documents/lartest/demo/bootstrap/autoload.php on line 17 

Answer 1

假设您已经成功安装了php7.0-cli。

现在在终端中运行以下命令：

sudo apt-get install php7.0-mbstring
sudo apt-get install php7.0-xml

然后尝试再次安装Laravel。

让我知道您是否仍然遇到任何问题。

Answer 2

首先为php扩展安装ext-dom，然后再次运行compser update

Answer 3

您可以先完成Laravel所需的依赖关系，然后再安装laravel。 有关依赖项的信息，请参见此处

我可以这样：

sudo apt-get install software-properties-common
sudo add-apt-repository ppa:ondrej/php
sudo apt-get update

在这里我使用PHP 7.1

sudo apt-get install php7.1

如果要使用其他版本，请自行更改。

PHP完成安装后，可以继续安装所需的扩展名。

sudo apt-get install php7.1 php7.1-cli php7.1-common php7.1-json php7.1-opcache php7.1-mysql php7.1-mbstring php7.1-mcrypt php7.1-zip php7.1-xml php7.1-gd

上面的扩展应该laravel可以顺利安装。 您也可以仅采用上述扩展中的一个或多个，例如：

sudo apt-get install php7.1-mbstring php7.1-xml

然后重新启动服务器。

希望有用。