How can I solve "laravel/horizon v1.1.0 requires ext-pcntl * -> the requested PHP extension pcntl is missing from your system"? - development

How can I solve “laravel/horizon v1.1.0 requires ext-pcntl * -> the requested PHP extension pcntl is missing from your system”?

When I run composer install on command promp, there exist error like this :

  Problem 1
    - Installation request for laravel/horizon v1.1.0 -> satisfiable by laravel/horizon[v1.1.0].
    - laravel/horizon v1.1.0 requires ext-pcntl * -> the requested PHP extension pcntl is missing from your system.

  To enable extensions, verify that they are enabled in your .ini files:
    - C:xampp-7.1phpphp.ini
  You can also run `php --ini` inside terminal to see which files are used by PHP in CLI mode.

How can I solve this error?

from Laravel Questions and Answers https://laravelquestions.com/php/how-can-i-solve-laravel-horizon-v1-1-0-requires-ext-pcntl-the-requested-php-extension-pcntl-is-missing-from-your-system/
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