I encountered several problems when I first came into contact with laravel, especially the two problems during installation, which have not been solved.

1. Error when installing laravel 5.1:

Installation command:

composer create-project laravel/laravel learnlaravel52 5.1.11 --prefer-dist

mistake:

Created project in learnlaravel52
> php -r "copy('.env.example', '.env');"
> php artisan clear-compiled
Script php artisan clear-compiled handling the pre-update-cmd event returned with an error


  [RuntimeException]
  Error Output:

I have Googled this problem for a long time, and there is very little relevant information. There is an article that talks about a solution, but installing that solution did not solve it successfully.

2. How to install the specified version

Installation command:

composer create-project laravel/laravel learnlaravel52 5.2.31 --prefer-dist

Use artisan to check the installed version. The version is 5.2.45, which is not the specified 5.2.31. I have never figured out why