src/Compo/ImportBundle/Controller/DefaultController.php
private function getLetterArray()
    {
        $array = range('A', 'Z');
        $letters = $array;
        foreach ($array as $first) {
            foreach ($array as $second) {
                $letters[] = $first . $second;
            }
        }

        return $letters;
    }
private function getLetterArray()
    {
        $array = range('A', 'Z');
        $letters = $array;
        foreach ($array as $first) {
            foreach ($array as $second) {
                $letters[] = $first . $second;
            }
        }

        return $letters;
    }
private function getLetterArray ( ) { $ array = range ( 'A' , 'Z' ) ; $ letters = $ array ; foreach ( $ array as $ first ) { foreach ( $ array as $ second ) { $ letters [ ] = $ first . $ second ; } } return $ letters ; }
get array from A to ZZ.

@return array
get array from A to ZZ .