#diffIds #verify

diffIds.php

<?php

$diffIds = \Illuminate\Support\Str::of($inputStrIds = '1,2,5, ')
    ->trim()->trim(',')->trim()
    ->explode(',')
    ->filter(function ($value){
        return filled($value);
    })
    ->map(function ($item){
        return trim($item);
    })
    ->pipe(function (\Illuminate\Support\Collection $inputArrIds): \Illuminate\Support\Collection{
        $dbIds = ['1', '2', '3'];

        return $inputArrIds->diff($inputArrIds->intersect($dbIds));
    })
    ->dd();