安装库时Composer ErrorException

Question

I'm working on installing a codebase from github (which is still in Pre-release stages). I am able to clone, from GitHub, to my working WAMP server. When I try to run "composer install" it eventually runs into an exception and I'm not entirely sure how to fix it? Am I missing local libraries in PEAR / php?

Writing lock file
Generating autoload files
exception 'ErrorException' with message 'call_user_func() expects parameter 1 to be a valid callback, function 'mb_strto
lower' not found or invalid function name' in C:\Apache24\htdocs\streams\vendor\laravel\framework\src\Illuminate\Support
\Pluralizer.php:258

The exception as a gist with stack trace and more:
https://gist.github.com/markbratanov/386be4c492dc16b8b43f

Any help / comments / advice would be appreciated

Answer 1

You need to install / enable the mbstring extension.

Further information can be found on php.net