如何在ubuntu 16.04中安装laravel 5.6？

Question

我使用以下命令将PHP 7.0升级为7.1：

1. sudo add-apt-repository ppa:ondrej/php
2. sudo apt-get update
3. sudo apt-get install php7.1

并从laravel.com运行此命令：

composer create-project --prefer-dist laravel/laravel blog

运行此代码后，出现以下错误：

Your requirements could not be resolved to an installable set of packages.

Problem 1
- laravel/framework v5.6.0 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
- laravel/framework 5.6.x-dev requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
- Installation request for laravel/framework 5.6.* -> satisfiable by laravel/framework[5.6.x-dev, v5.6.0].

To enable extensions, verify that they are enabled in those .ini files:
- /etc/php/7.1/cli/php.ini
- /etc/php/7.1/cli/conf.d/10-opcache.ini
- /etc/php/7.1/cli/conf.d/10-pdo.ini
- /etc/php/7.1/cli/conf.d/20-calendar.ini
- /etc/php/7.1/cli/conf.d/20-ctype.ini
- /etc/php/7.1/cli/conf.d/20-exif.ini
- /etc/php/7.1/cli/conf.d/20-fileinfo.ini
- /etc/php/7.1/cli/conf.d/20-ftp.ini
- /etc/php/7.1/cli/conf.d/20-gettext.ini
- /etc/php/7.1/cli/conf.d/20-iconv.ini
- /etc/php/7.1/cli/conf.d/20-json.ini
- /etc/php/7.1/cli/conf.d/20-phar.ini
- /etc/php/7.1/cli/conf.d/20-posix.ini
- /etc/php/7.1/cli/conf.d/20-readline.ini
- /etc/php/7.1/cli/conf.d/20-shmop.ini
- /etc/php/7.1/cli/conf.d/20-sockets.ini
- /etc/php/7.1/cli/conf.d/20-sysvmsg.ini
- /etc/php/7.1/cli/conf.d/20-sysvsem.ini
- /etc/php/7.1/cli/conf.d/20-sysvshm.ini
- /etc/php/7.1/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.

更新1：

我运行此命令：     sudo apt-get install php7.1-mbstring     sudo apt-get install libapache2-mod-php7.1

afetr run composer create-project --prefer-dist laravel/laravel blog命令，显示错误：

Failed to decode response: zlib_decode(): data error
Retrying with degraded mode, check    https://getcomposer.org/doc/articles/troubleshooting.md#degraded-mode for more info


[Composer\Downloader\TransportException]                                                                                                     
Your configuration does not allow connection to http://packagist.org. See https://getcomposer.org/doc/06-config.md#secure-http for details. 

如何解决此错误？

Answer 1

你需要，

安装mbstring：

sudo apt-get install php7.1-mbstring
sudo apt-get install libapache2-mod-php7.1

然后，

重新启动服务器：

sudo service apache2 restart
or
sudo service nginx restart

要使用composer解决错误，请运行：

sudo composer self-update

sudo composer clear-cache

sudo composer config -g secure-http false

Answer 2

按照以下步骤安装laravel：

安装作曲家

curl -sS https://getcomposer.org/installer | php
  
sudo mv composer.phar /usr/local/bin/composer
  
sudo chmod +x /usr/local/bin/composer

安装后，在终端上键入composer时，您将获得

Laravel基本要求：

如果您不使用Homestead，则需要确保您的服务器满足以下要求：

• PHP> = 7.3
• BCMath PHP扩展
• Ctype PHP扩展
• Fileinfo PHP扩展
• JSON PHP扩展
• Mbstring PHP扩展sudo apt-get install php-mbstring
• OpenSSL PHP扩展
• PDO PHP扩展
• Tokenizer PHP扩展
• XML PHP扩展sudo apt-get install php-xml

安装Laravel

composer create-project --prefer-dist laravel/laravel project-name

在安装laravel之后，像下面这样向您的storage, bootstrap文件夹分配权限：

sudo chmod  -R 777 storage  

sudo chmod  -R 777 bootstrap

现在，您可以使用serve命令运行项目了：

 php artisan serve

查看详细的文档检查laravel-installation

Answer 3

sudo apt-get install php libapache2-mod-php php-common php-mbstring php-xmlrpc php-soap php-gd php-xml php-mysql php-cli php-mcrypt

这将安装Laravel所需的所有php扩展。