laravel 安装

1. 安装composer.
2. 进入nginx主目录 cd /Applications/MAMP/htdocs/
3. 设置国内镜像，执行 composer config -g repo.packagist composer https://packagist.phpcomposer.com
4. 下载laravel, composer global require "laravel/installer
5. 新建laravel项目composer create-project laravel/laravel ldemo --prefer-dist。安装成功后，看到htdocs目录下有了新目录ldemo。须要看到vendor目录下有了autoload.php才算安装成功。若是看到有报错信息，例如

   - Installing paragonie/random_compat (v9.99.99): Downloading (failed)       
   The "https://api.github.com/repos/paragonie/random_compat/zipball/84b4dfb120c6f9b4ff7b3685f9b8f1aa365a0c95" file could not be downloaded: failed to open stream: Operation timed out
   Retrying with degraded mode, check https://getcomposer.org/doc/articles/troubleshooting.md#degraded-mode for more info
   Downloading (failed)       
   Downloading (failed)       
   Downloading (failed)    Failed to download paragonie/random_compat from dist: The "https://api.github.com/repos/paragonie/random_compat/zipball/84b4dfb120c6f9b4ff7b3685f9b8f1aa365a0c95" file could not be downloaded: failed to open stream: Operation timed out
   Now trying to download from source

那么须要从新下载random_compat.
执行 composer require paragonie/random_compat:2.*

6. 生成key. php artisan key:generate
7. 把项目主目录设到ldemo/public目录下，访问http://localhost/.