Solve the problem of introducing composer vendor extension package in ThinkPHP5.1 version

Version description

Old version: ThinkPHP5.0

New version: ThinkPHP5.1

Problem: The Loader::import method and the import and vendor helper functions have been canceled in TP5.1. They all use the namespace and automatic loading mechanism, resulting in an error when the imported class library cannot be found.

Solution: Because "All use namespace and automatic loading mechanism", so composer/installed.json was modified (the text description is in the comments below)

##

    {
        "name": "curl/curl",
        "version": "2.3.0",
        "version_normalized": "2.3.0.0",
        "source": {
            "type": "git",
            "url": "https://github.com/php-mod/curl.git",
            "reference": "3ad560b1fc1bbdf5c7681356ab953fb961f255e5"
        },
        "dist": {
            "type": "zip",
            "url": "https://api.github.com/repos/php-mod/curl/zipball/3ad560b1fc1bbdf5c7681356ab953fb961f255e5",
            "reference": "3ad560b1fc1bbdf5c7681356ab953fb961f255e5",
            "shasum": ""
        },
        "require": {
            "ext-curl": "*",
            "php": "^5.6 | ^7.0"
        },
        "require-dev": {
            "phpunit/phpunit": "^5.7",
            "squizlabs/php_codesniffer": "~2.1"
        },
        "time": "2020-03-19T20:07:26+00:00",
        "type": "library",
        "installation-source": "dist",
        "autoload": {
            "psr-0": {
                "Curl": "src/"
            },
            //在此处添加 files 字段，把类库文件的相对路径填入
            "files":[
                "vendor/curl/curl/src/Curl/Curl.php"
            ]
        },
        "notification-url": "https://packagist.org/downloads/",
        "license": [
            "MIT"
        ],
        "authors": [
            {
                "name": "php-curl-class",
                "homepage": "https://github.com/php-curl-class"
            },
            {
                "name": "Hassan Amouhzi",
                "email": "hassan@anezi.net",
                "homepage": "http://hassan.amouhzi.com"
            },
            {
                "name": "user52",
                "homepage": "https://github.com/user52"
            }
        ],
        "description": "cURL class for PHP",
        "homepage": "https://github.com/php-mod/curl",
        "keywords": [
            "curl",
            "dot"
        ]
    }