Connection.php

<?php
namespace App\Connection;

class Connection {


    public $Error;
    public $Connection;
    public  $dataSourceName = "odbc:boreal";

    public function _construct(){
        try{
            $this->Connection = new \PDO($this->dataSourceName);
            $this->Connection->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
        }catch(PDOException  $e){
            $this->Error = $e->getMessage();

        }
    }

    public function query($req){
      return $this->Connection->query($req);
    }
}

voici le resultat du var_dump

object(App\Connection\Connection)[2]
  public 'Error' => null
  public 'Connection' => null
  public 'dataSourceName' => string 'odbc:boreal' (length=11)