Illuminate\Database\Query\Builder::clearSelectAliases PHP 메소드

    protected function clearSelectAliases(array $columns)
    {
        return array_map(function ($column) {
            return is_string($column) && ($aliasPosition = strpos(strtolower($column), ' as ')) !== false ? substr($column, 0, $aliasPosition) : $column;
        }, $columns);
    }