Call to undefined function str_singular() laravel filemanager code example

Example: Call to undefined function str_singular() laravel filemanager

These laravel helpers no longer exist.

Introduced on L5.8 and omitted in L6.0, these helpers are replaced by

Illuminate\Support\Str and Illuminate\Support\Arr

classes respectively.
In your example, this is replaced by Illuminate\Support\Str::singular(); etc.

Simple solution is run following command on your project terminal

You can pull them in with

composer require laravel/helpers