think\Console::getAbbreviations PHP Method

    public static function getAbbreviations($names)
    {
        $abbrevs = [];
        foreach ($names as $name) {
            for ($len = strlen($name); $len > 0; --$len) {
                $abbrev = substr($name, 0, $len);
                $abbrevs[$abbrev][] = $name;
            }
        }
        return $abbrevs;
    }