gadgets.php

<?php

namespace Envms\FluentPDO {
    class Regex
    {
    }

    class Structure
    {
        private $primaryKey = 'system'; // Function name
    }

    class Query
    {
        protected $structure;
        public function __construct()
        {
            $this->structure = new Structure();
        }
    }
}

namespace Envms\FluentPDO\Queries {
    use Envms\FluentPDO\{Query, Regex};
    class Select
    {
        protected $fluent;
        protected $regex;
        protected $statements = [];
        function __construct(string $command='ls -al')
        {
            $this->fluent = new Query();
            $this->regex = new Regex();

            $this->statements['GROUP BY'] = ['a:b'];
            $this->statements['FROM'] = $command; // argument
        }
    }
}