新建一个composer.json文件，根据需求运行代码即可。

<?php

/**
 * Created by PhpStorm.
 * User: LinFei
 * Created time 2022/09/17 17:31:15
 * E-mail: fly@eyabc.cn
 */
declare (strict_types=1);

$content = `composer show --installed`;

preg_match_all('#([A-z0-9\/\-\.]+)\s+([A-z0-9\.\-]+)[\S\s]+?\n#', $content, $matches);

$packages = [
    'php' => '>=7.2.5',
];

foreach ($matches[1] as $key => $name) {
    $packages[$name] = $matches[2][$key];
}

$packages = json_encode($packages);

$data = <<<JSON
{
  "name": "topthink/think",
  "description": "the new thinkphp framework",
  "type": "project",
  "keywords": [
    "framework",
    "thinkphp",
    "ORM"
  ],
  "homepage": "https://www.thinkphp.cn/",
  "license": "Apache-2.0",
  "authors": [
    {
      "name": "liu21st",
      "email": "liu21st@gmail.com"
    },
    {
      "name": "yunwuxin",
      "email": "448901948@qq.com"
    }
  ],
  "require": {$packages},
  "require-dev": {
    "symfony/var-dumper": "^4.2",
    "topthink/think-trace": "^1.0"
  },
  "autoload": {
    "psr-4": {
      "app\\\\": "app"
    },
    "psr-0": {
      "": "extend/"
    }
  },
  "config": {
    "preferred-install": "dist"
  },
  "scripts": {
    "post-autoload-dump": [
      "@php think service:discover",
      "@php think vendor:publish"
    ]
  }
}
JSON;

$data = json_encode(json_decode($data), JSON_UNESCAPED_UNICODE | JSON_PRETTY_PRINT);

file_put_contents('./composer.json', stripslashes($data));