错误 #1：Composer install cant find composer.json

Composer install cant find composer.json

Composer could not find the config file:

E:\phpstudy\phpstudy_pro\Extensions\composer1.8.5

解决办法：

删除掉 Windows 10 环境变量 composer，该变量是 phpstudy 安装过程中，自动添加的。

删除 phpstudy 指定的 composer， 重新安装 composer，则 composer.json not found 报错消失。

错误 #2： Your requirements could not be resolved to an installable set of packages.

解决办法：指定全局使用 阿里云镜像

composer config -g repo.packagist composer https://mirrors.aliyun.com/composer/

参考链接：COMPOSER 阿里云镜像

Composer could not find the config file: E:\phpstudy\phpstudy_pro\Extensions\composer1.8.5
composer install
No composer.lock file present. Updating dependencies to latest instead of installing from lock file. See https://getcomposer.org/install for more information.
Loading composer repositories with package information

Updating dependencies
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - Root composer.json requires dcat/laravel-admin, it could not be found in any version, there may be a typo in the package name.
  Problem 2
    - Root composer.json requires fideloper/proxy, it could not be found in any version, there may be a typo in the package name.
  Problem 3
    - Root composer.json requires laravel/framework, it could not be found in any version, there may be a typo in the package name.
  Problem 4
    - Root composer.json requires laravel/tinker, it could not be found in any version, there may be a typo in the package name.
  Problem 5
    - Root composer.json requires beyondcode/laravel-dump-server, it could not be found in any version, there may be a typo in the package name.
  Problem 6
    - Root composer.json requires filp/whoops, it could not be found in any version, there may be a typo in the package name.
  Problem 7
    - Root composer.json requires fzaninotto/faker, it could not be found in any version, there may be a typo in the package name.
  Problem 8
    - Root composer.json requires mockery/mockery, it could not be found in any version, there may be a typo in the package name.
  Problem 9
    - Root composer.json requires nunomaduro/collision, it could not be found in any version, there may be a typo in the package name.
  Problem 10
    - Root composer.json requires phpunit/phpunit, it could not be found in any version, there may be a typo in the package name.