How to solve Script php -r "copy('.env.example', '.env');" handling the post-root-package-install event returned with error code 1

Question

I tried to create a project using this command in git bash

composer create-project --prefer-dist laravel/laravel cms 5.2.29

then I got an error that is

Error:

** Creating a "laravel/laravel" project at "./cms" Installing laravel/laravel (v5.2.29)

• Installing laravel/laravel (v5.2.29): Loading from cache Created project in C:\xampp\htdocs\cms

php -r "copy('.env.example', '.env');"

'php' is not recognized as an internal or external command, operable program or batch file.

Script php -r "copy('.env.example', '.env');" handling the post-root-package-install event returned with error code 1

**

Then I checked environment variable and there is the path of php and git

C:\xampp\php\php.exe

C:\Program Files\Git

After that I added the bash.bashrc file using this command

alias php='c/xampp/php/php.exe'

It's not working... I tried to see the version of php in git bash, it's work. Then I again tried to create project using the same command that I declare before. And again I got this same error.

Note: this command absolutely work on command prompt