新建github项目 并拉取到本地
本地执行composer init 初始化
打开composer.json编辑配置

{
    "name": "wangsitong/perfect-curl",
    "description": "easy curl for requests", 
    "type": "library", 
    "authors": [
        {
            "name": "wangsitong",
            "email": "512350703@qq.com"
        }
    ],
    "require": {
        "php": "^5.6|^7.0"
    },
    "minimum-stability": "dev",
    "license": "MIT",
    "keywords": [
        "curl",
        "wangsitong",
        "perfect-curl"
    ],
    "autoload": {
        "psr-4": {
            "PerfectCURL\\": "src/"
        }
    }
}

composer install 添加自动加载

更新代码至github
使用github账号登录 https://packagist.org
点击submit
将你的项目的 github 地址 填到那个 input 中
点击check, 检测 composer.json 是否有误

异常处理:
Warning from https://mirrors.aliyun.com/composer: Support for Composer 1 is deprecated and some packages will not be available. You should upgrade to Composer 2. See

或者提示找不到对应版本
composer self-update新包只支持composer2.0

https://github.com/wang-sitong/perfect-curl

https://packagist.org/packages/wangsitong/perfect-curl

composer require wangsitong/perfect-curl