Tried installation Yii3 on a Yii2 machine ( of course separate directory) to coexist together as a development machine.
- step one manual download ( clone) from Github.
Ran Composer then found issues with PHP settings. I could not find the requirement php file which helps to have the basic requirements. this is will be helpful.
Once composer issues was rectified, found asset manager not found while composer update was performed install. then cleared composer cache but still failed.
Step two tried composer create-project --prefer-dist --stability=dev yiisoft/yii-project-template myapp it ask for NPM binaries. Why do I need NPM.
Please simply the installation process before going forward. Its important to strengthen Yii2 on PHP and integrating other technologies.