dp709369831
2017-07-03 17:18
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系统中缺少所请求的PHP扩展名mbstring

my error message that I am getting from the composer is: Your requirements could not be resolved to an installable set of packages.

 Problem 1
    - Installation request for laravel/framework v5.4.28 -> satisfiable by laravel/framework[v5.4.28].
    - laravel/framework v5.4.28 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
  Problem 2
    - Installation request for phpunit/phpunit 5.7.21 -> satisfiable by phpunit/phpunit[5.7.21].
    - phpunit/phpunit 5.7.21 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
  Problem 3
    - laravel/framework v5.4.28 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - laravel/tinker v1.0.1 requires illuminate/console ~5.1 -> satisfiable by laravel/framework[v5.4.28].
    - Installation request for laravel/tinker v1.0.1 -> satisfiable by laravel/tinker[v1.0.1].

I have tried uncommenting the extension=php_mbstring.dll but it still raises the error. I have tried to change the extension_dir in the "php.ini" and it gives an error. Help is appreciated.

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