Composer

Update: Check out our new Yii2 Developer Exchange site at http://yii2x.com. It’s devoted exclusively for Yii2 developers to make it easier to find news, tips, tutorials and extensions related to Yii2.2>Composer Update Errors

“Your requirements could not be resolved to an installable set of packages.”

If you run into this composer update error, there is a simple solution below:

php composer.phar update
Loading composer repositories with package information
Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - Installation request for yiisoft/yii2 * -> satisfiable by yiisoft/yii2[2.0.0].
    - yiisoft/yii2 2.0.0 requires bower-asset/jquery 2.1.*@stable | 1.11.*@stable -> no matching package found.
  Problem 2
    - Installation request for yiisoft/yii2-bootstrap * -> satisfiable by yiisoft/yii2-bootstrap[2.0.0].
    - yiisoft/yii2-bootstrap 2.0.0 requires bower-asset/bootstrap 3.2.* | 3.1.* -> no matching package found.
  Problem 3
    - Installation request for yiisoft/yii2-gii * -> satisfiable by yiisoft/yii2-gii[2.0.0].
    - yiisoft/yii2-gii 2.0.0 requires bower-asset/typeahead.js 0.10.* -> no matching package found.
  Problem 4
    - yiisoft/yii2 2.0.0 requires bower-asset/jquery 2.1.*@stable | 1.11.*@stable -> no matching package found.
    - yiisoft/yii2-faker 2.0.0 requires yiisoft/yii2 * -> satisfiable by yiisoft/yii2[2.0.0].
    - Installation request for yiisoft/yii2-faker * -> satisfiable by yiisoft/yii2-faker[2.0.0].

Potential causes:
 - A typo in the package name
 - The package is not available in a stable-enough version according to your minimum-stability setting
   see <https://groups.google.com/d/topic/composer-dev/_g3ASeIFlrc/discussion> for more details.

Read <http://getcomposer.org/doc/articles/troubleshooting.md> for further common problems.

You need to update the composer plugin module, then update:

php composer.phar global require "fxp/composer-asset-plugin:1.0.0-beta4"
sudo php composer.phar update

[RuntimeException] vendor does not exist and could not be created.

If you run into this error, you need to run composer with the proper permissions:

sudo php composer.phar update

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