How can i format a file size using php?

I have a form where i am uploading a file after successfully file uploaded i want to show a size of each file with KB, MB, GB depends on the file size.

Like this

<div class="d-flex align-items-center gap-3">
  <img src="{{asset('images/icons/file-icon.svg')}}" alt="" style="width: 70px;height: 70px;border-radius: 10px;">
  <div>
    <p class="font-weight-bold m-0 text-primary-dark">{{ $media->name }}</p>
    <p class="m-0 font-weight-bold text-primary-dark">{{ formatFileSize($media->size) }}</p>
  </div>
</div>

I have create a function in which i am sending a size like this in my blade

{{ formatFileSize($media->size) }}

this should give me a proper format with the unit