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

Question

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

  Problem 1
    - Installation request for laravel/horizon v1.1.0 ->         


        

Answer 1

As per the accepted answer, but you can add this to your composer.json so that you don't have to run --ignore-platform-reqs all the time

"config": {
  "platform": {
    "ext-pcntl": "7.3",
    "ext-posix": "7.3"
  }
}