convert snake case to camel case laravel code example

Example 1: {{Str::limit laravel

{{Str::limit($category->name, 20)}}

if to end 
  
{{Str::limit($category->name, 20, $end='.......')}}
             
or
  
{{\Illuminate\Support\Str::limit($category->name, 20)}}

Example 2: laravel slug

$ composer require cviebrock/eloquent-sluggable