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

问题

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

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

But I am encountering the following problem:

My internet connection is on proxy server: 192.168.20.9:8080 Moreover, I am on windows platform win8.1 x64 and Xampp with PHP 5.6.11, any help?

回答1:

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

回答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

回答3:

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.

回答4:

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.

回答5:

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)

来源：https://stackoverflow.com/questions/31636294/https-packagist-org-packages-json-file-could-not-be-downloaded