composer錯誤： Composer\Downloader\TransportException

 [Composer\Downloader\TransportException]
  The "http://packagist.org/packages.json" file could not be downloaded: failed to open stream: HTTP request failed!

create-project [-s|--stability="..."] [--prefer-source] [--prefer-dist] [--repository-url="..."] [--dev] [--no-dev] [--n
o-plugins] [--no-custom-installers] [--no-scripts] [--no-progress] [--keep-vcs] [--no-install] [--ignore-platform-reqs]
[package] [directory] [version]

解決方法禁用https請求，改用http方式。所以我們在composer.json文件中設置一個本地或全局的composer配置config

方法一：命令行composer config secure-http false。通過命令修改composer.json，效果等同方法二。

方法二：直接改composer.json,給“config”項中加上"secure-http": false 

"config" : {  
        "vendor-dir" : "packages",
        "secure-http": false  
}

 

全局配置（推薦）

composer config -l -g
//切換到國內源  阿里
composer config -g repo.packagist composer https://mirrors.aliyun.com/composer/
composer config -g --unset repos.packagist