运行php artisan serve时突然就报错了
warning: invalid argument supplied for foreach() in d:\xampp\htdocs\baiduyun\vendor\composer\autoload_real.php on line 27call stack: 0.0012 120376 1. {main}() d:\xampp\htdocs\baiduyun\artisan:0 0.0016 122520 2. require('d:\xampp\htdocs\baiduyun\bootstrap\autoload.php') d:\xampp\htdocs\baiduyun\artisan:16 0.0021 123824 3. require('d:\xampp\htdocs\baiduyun\vendor\autoload.php') d:\xampp\htdocs\baiduyun\bootstrap\autoload.php:17 0.0027 133680 4. composerautoloaderinitaf5083d097d55e814d46f33a1de9d74d::getloader() d:\xampp\htdocs\baiduyun\vendor\autoload.php:7fatal error: class 'dotenv' not found in d:\xampp\htdocs\baiduyun\vendor\laravel\framework\src\illuminate\foundation\bootstrap\detectenvironment.php on line 20call stack: 0.0012 120376 1. {main}() d:\xampp\htdocs\baiduyun\artisan:0 0.1532 1670160 2. illuminate\foundation\console\kernel->handle() d:\xampp\htdocs\baiduyun\artisan:36 0.1532 1670224 3. illuminate\foundation\console\kernel->bootstrap() d:\xampp\htdocs\baiduyun\vendor\laravel\framework\src\illuminate\foundation\console\kernel.php:105 0.1535 1670312 4. illuminate\foundation\application->bootstrapwith() d:\xampp\htdocs\baiduyun\vendor\laravel\framework\src\illuminate\foundation\console\kernel.php:208 0.1598 1675184 5. illuminate\foundation\bootstrap\detectenvironment->bootstrap() d:\xampp\htdocs\baiduyun\vendor\laravel\framework\src\illuminate\foundation\application.php:203

回复内容： 运行php artisan serve时突然就报错了
warning: invalid argument supplied for foreach() in d:\xampp\htdocs\baiduyun\vendor\composer\autoload_real.php on line 27call stack: 0.0012 120376 1. {main}() d:\xampp\htdocs\baiduyun\artisan:0 0.0016 122520 2. require('d:\xampp\htdocs\baiduyun\bootstrap\autoload.php') d:\xampp\htdocs\baiduyun\artisan:16 0.0021 123824 3. require('d:\xampp\htdocs\baiduyun\vendor\autoload.php') d:\xampp\htdocs\baiduyun\bootstrap\autoload.php:17 0.0027 133680 4. composerautoloaderinitaf5083d097d55e814d46f33a1de9d74d::getloader() d:\xampp\htdocs\baiduyun\vendor\autoload.php:7fatal error: class 'dotenv' not found in d:\xampp\htdocs\baiduyun\vendor\laravel\framework\src\illuminate\foundation\bootstrap\detectenvironment.php on line 20call stack: 0.0012 120376 1. {main}() d:\xampp\htdocs\baiduyun\artisan:0 0.1532 1670160 2. illuminate\foundation\console\kernel->handle() d:\xampp\htdocs\baiduyun\artisan:36 0.1532 1670224 3. illuminate\foundation\console\kernel->bootstrap() d:\xampp\htdocs\baiduyun\vendor\laravel\framework\src\illuminate\foundation\console\kernel.php:105 0.1535 1670312 4. illuminate\foundation\application->bootstrapwith() d:\xampp\htdocs\baiduyun\vendor\laravel\framework\src\illuminate\foundation\console\kernel.php:208 0.1598 1675184 5. illuminate\foundation\bootstrap\detectenvironment->bootstrap() d:\xampp\htdocs\baiduyun\vendor\laravel\framework\src\illuminate\foundation\application.php:203