Error in creating yii2 project with composer - yii2

Question

I want to create yii2 project in windows 10. I use composer create-projectcommand truly, but I against with error.
Here is composer create-project command in Command Prompt:
And of course I get the same error in composer global require "fxp/composer-asset-plugin:~1.2.0":
I had no composer.json file in folder C:/Users/Mohammad/AppData/Roaming/Composer after installing composer-setup.exe, and I copied composer.json file from one of my projects in folder C:/Users/Mohammad/AppData/Roaming/Composer.
This is my composer.json in folder C:/Users/Mohammad/AppData/Roaming/Composer:
{
"name": "yiisoft/yii2-app-advanced",
"description": "Yii 2 Advanced Project Template",
"keywords": ["yii2", "framework", "advanced", "project template"],
"homepage": "http://www.yiiframework.com/",
"type": "project",
"license": "BSD-3-Clause",
"support": {
"issues": "https://github.com/yiisoft/yii2/issues?state=open",
"forum": "http://www.yiiframework.com/forum/",
"wiki": "http://www.yiiframework.com/wiki/",
"irc": "irc://irc.freenode.net/yii",
"source": "https://github.com/yiisoft/yii2"
},
"minimum-stability": "stable",
"require": {
"php": ">=5.4.0",
"yiisoft/yii2": ">=2.0.6",
"yiisoft/yii2-bootstrap": "*",
"yiisoft/yii2-swiftmailer": "*",
"franciscomaya/yii2-sceditor": "dev-master",
"kartik-v/yii2-widget-sidenav": "*",
"mohammad-mahdy/yii2-jdate": "*",
"2amigos/yii2-ckeditor-widget" : "*",
"2amigos/yii2-gallery-widget": "~1.0",
"romka-chev/yii2-swiper" : "*",
"kartik-v/yii2-widgets": "*",
"kartik-v/yii2-grid": "#dev",
"yiisoft/yii2-imagine": "*",
"omnilight/yii2-shopping-cart": "*",
"fxp/composer-asset-plugin": "^1.0"
},
"require-dev": {
"yiisoft/yii2-codeception": "*",
"yiisoft/yii2-debug": "*",
"yiisoft/yii2-gii": "*",
"yiisoft/yii2-faker": "*"
},
"config": {
"process-timeout": 1800
},
"extra": {
"asset-installer-paths": {
"npm-asset-library": "vendor/npm",
"bower-asset-library": "vendor/bower"
}
}
}
Please help me to fix it.

Answer 1

I have no problems in installing yii2 project using composer in my windows 10 system. Delete the folder basic or yii2Basic inside C:\xampp\htdocs and follow these steps for smooth installation.
Check composer is installed on your system. You can check this by typing composer in your command line and hitting enter. If composer is successfully installed you will see a screen like this.
Next step is to install the Composer Asset Plugin.Before that you need to remove the folder composer from C:/Users/Mohammad/AppData/Roaming/Composer if one is there.Then Run the following command to install it.
composer global require "fxp/composer-asset-plugin:~1.2.0"
Now navigate to the directory you wish to maintain your source code.In your case it would be
cd C:\xampp\htdocs
Now to install the basic application template run the command below.
composer create-project yiisoft/yii2-app-basic basic 2.0.10
In the process you might see a screen as given below asking you to input token.
This is normal just login to your github account and paste the url given to generate the token.The copied token is then pasted for the installation to continue.Sometimes you might be asked to enter your github username and password,these are normal just follow the steps and you are ready to go.
If still the problem persists check the contents inside of your composer.json
Contents inside my composer.json is given below
{
"require": {
"fxp/composer-asset-plugin": "^1.2.0"
}
}

Answer 2

Go to the folder:
C:/Users/Mohammad/AppData/Roaming/Composer
and edit the composer.json file.
Make sure there are no unnecessary entries (like non-global packages).
For example my global composer.json looks like this:
{
"require": {
"fxp/composer-asset-plugin": "1.2.0",
"codeception/codeception": "^2.2"
}
}
After removing what should not be there save it and run in console
composer global update
There is a chance you have installed some package like Yii 2 globally and that is why you get this error.
If this goes fine you can go to the project folder and retry to install Yii 2 (don't use global when installing local project like this).

Answer 3

If you don't want to use plugin to create Yii2 project, you could try fixed Bower one:
Basic Template:
composer create-project --prefer-dist yidas/yii2-app-basic
Advanced Template
composer create-project --prefer-dist yidas/yii2-app-advanced
With fixed Bower vendor, which could prevent your Composer error.
Refer yidas/yii2-composer-bower-skip