How to solve - require dev mikey179 vfsStream is invalid, it should not contain uppercase characters

How to solve - require dev mikey179 vfsStream is invalid, it should not contain uppercase characters

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Ambar Hasbiyatmoko
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Published on ● Video Link: https://www.youtube.com/watch?v=KXrM86jIa54


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i am trying to install phpunit with command:
$ php composer.phar require --dev phpunit/phpunit ^8


but get this error :

require-dev.mikey179 vfsStream is invalid, it should not contain uppercase characters. Please use mikey179 vfsstream instead




this video will help you how to solve the error.



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Tags:
composer
error
ubuntu
terminal
phpunit
mikey179/vfsStream
composer.json
php
composer.phar
solve
install