Error when using composer require-dev.mikey179/vfsStream is invalid

Question

I am using Amazon LightSail and the CodeIgniter framework. Trying to install PhpSpreadsheet - https://phpspreadsheet.readthedocs.io/en/latest/#installation using

composer require phpoffice/phpspreadsheet

However I then am greeted with

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

I did the usual Googling but couldn't find anything specific.

When I run

composer.phar show

I get the error from above.

also check this: https://github.com/bovigo/vfsStream/issues/173 — Vickel, May 07 '21 at 14:55
Please share more details about the current state of your `composer.json`. Also, which version of Composer are you using? — Nico Haase, May 08 '21 at 08:23
How do I find out the version? Every command I try and run, it fails with that error. I'm on Amazon LightSail... — pee2pee, May 08 '21 at 18:03

score 20 · Accepted Answer · answered May 07 '21 at 15:35

20

You must have mikey179/vfsStream in your composer.json in require-dev section (as the problem is for require-dev and you are trying to do normal require).

Simply change the name of package to all lowercase characters.

answered May 07 '21 at 15:35

kuba

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Aidid Alam · Answer 2 · 2023-06-09T01:23:30.980

11

Just replace mikey179/vfsStream with mikey179/vfsstream

they need to be in lowercase

edited Jun 09 '23 at 01:23

answered Sep 30 '21 at 18:07

Aidid Alam

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2

This has already been pointed out in several other answers. – Adrian Mole Sep 30 '21 at 19:08

score 5 · Answer 3 · answered May 11 '21 at 06:48

5

Make this "mikey179/vfsStream" package name to lowercase.

"mikey179/vfsStream" replace this to "mikey179/vfsstream"

answered May 11 '21 at 06:48

Rauf P

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score 2 · Answer 4 · edited Jun 30 '22 at 03:48

2

In your composer.json file look for mikey179/vfsStream and lowercase all its characters and make it mikey179/vfsstream

"require-dev": {
    "mikey179/vfsstream": "1.1.*",
    "phpunit/phpunit": "4.* || 5.*"
}

edited Jun 30 '22 at 03:48

Skatox

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answered Sep 01 '21 at 11:22

Shivam Kumar

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Error when using composer require-dev.mikey179/vfsStream is invalid

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