下面由composer教程栏目给大家介绍解决composer错误：Composer\\\\Downloader\\\\TransportException的方法，希望对需要的朋友有所帮助！
[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]
解决方法禁用https请求，改用http方式。所以我们在composer.json文件中设置一个本地或全局的composer配置config
方法一：命令行composer config secure-http false。通过命令修改composer.json，效果等同方法二。
方法二：直接改composer.json,给“config”项中加上"secure-http": false
"config" : {
"vendor-dir" : "packages", "secure-http": false }
全局配置（推荐）
composer config -l -g//切换到国内源 阿里composer config -g repo.packagist composer https://mirrors.aliyun.com/composer/composer config -g --unset repos.packagist
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