“https://packagist.org/packages.json” file could not be downloaded

Question

I am trying to install a new laravel instance with the following command:

composer create-project laravel/larevel authii --prefer-dist

But

Answer 1

I noticed that this also happens when changing the networks. If I put the comüputer to sleep and then continue connected to other networks this happens. So either restart the computer or your docker. Seems to work for me. Had the issue 2 times already.

Answer 2

Linux users can run this command to resolve this issue:

sudo sh -c "echo 'precedence ::ffff:0:0/96 100' >> /etc/gai.conf"

More Information

Answer 3

You need to tell composer to use a proxy.

Linke here: PHP Composer behind http proxy and Composer cannot download files

Like:

export HTTP_PROXY="http://my-corp-proxy.mcdonalds"
php composer.phar install

Answer 4

For windows user open cmd and put this command

set http_proxy= xxx.xxx.xxx.xxx:xxxx (YOUR_IP:PORT)
set https_proxy= xxx.xxx.xxx.xxx:xxxx (YOUR_IP:PORT)

Answer 5

The fix for me was found here: https://getcomposer.org/doc/articles/troubleshooting.md#operation-timed-out-ipv6-issues-.

I had to disable IPv6 on my network interfaces. After disabling that, composer worked fine.