add Model.php in Noyau

Noyau/Model.php

@@ -0,0 +1,23 @@
+<?php
+
+final class Model
+{
+    private static $conn = null;
+
+    public static function get(){
+        if($conn === null){
+            init();
+        }
+        return $conn;
+    }
+
+    private static function init(){
+        $PDO_URI = sprintf("mysql:host=%s;dbname=%s", $_ENV["DB_HOST"], $_ENV["DB_DBNAME"]);
+
+        try{
+            $conn = new PDO($PDO_URI, $_ENV["DB_USER"], $_ENV["DB_PASSWORD"]);
+        }catch(PDOException $e){
+            die("Connection to the database failed");
+        } 
+    }
+}