In a table class I want to use simple functions but also static functions, how can I do?
Here is my current code (which does not work)

In my controller, I just want to do: `Table::get('posts')` which directly invokes the function `check_table($table)`.

```
<?php
namespace Fwk\ORM;
use Fwk\Application;
use Fwk\Database\Database;

class Table extends Application {

    public function __construct()
    {
        $this->db = new Database();
    }

    public static function get($table) {
        if($this->check_table($table)) {
            return "ok";
        }

    }
    public function check_table($table) {
        $r = $this->$db->query("SELECT 1 FROM $table");
        return $r;
    }

}
?>

```