How do I filter a json file and only process date_of_birth between ages 18 - 65 and unknown in Laravel

I am trying to figure out how to only process data with date of birth between 18-65 and uknown

$contactInfo = Storage::disk('local')->exists('challenge.json') ? json_decode(Storage::disk('local')->get('challenge.json'), true) : [];
        
            $chunks = array_chunk($contactInfo, 1000);


            foreach ($chunks[0] as $contactDetail ){

            ............

                $contact->date_of_birth = (strlen($contactDetail['date_of_birth']) == 10)
                ? Carbon::createFromFormat('d/m/Y', $contactDetail['date_of_birth'])
                : $contactDetail['date_of_birth'];
                
                
                // $contact->save();
                // $sensitive_data->save();
                // $contact->creditcards()->attach($sensitive_data->id);
            }

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