Letters Combinations

combination.php

function everyCombination($array) {

        try {

            // initialize by adding the empty set
            $results = [[]];

            foreach ($array as $element) {
                $this->line($element);
                foreach ($results as $combination) {
                    $this->info(implode('', $combination));
                    $results[] = array_merge(array($element), $combination);
                }
            }
            
            $response = [];
            foreach($results as $result)
                if(count($result) > 1) $response[] = implode('', array_reverse($result));

            return $response;

        } catch(\Exception $e) {

            dd($e->getMessage());

        }


    }