laravel 错误提示Fatal Error: Class 'Pheanstalk\Pheanstalk' not found

本地环境版本:

composer -V
Composer version 1.8. -- ::10

　php artisan -V
　Laravel Framework 5.6.39

错误提示:

Fatal Error: Class 'Pheanstalk\Pheanstalk' not found

处理方法:

composer require pda/pheanstalk "3.*"