Ajout MyPDO.php

TP8-MVC/models/MyPDO.php

+<?php
+
+require_once('bdd.php');
+
+class MyPDO
+{
+    private static ?PDO $_pdo = null;
+
+    private function __construct() {}
+
+	public static function pdo() : PDO
+    {
+        global $SQL_DSN;
+        if ( self::$_pdo == null )
+            self::$_pdo = new PDO($SQL_DSN);
+        return self::$_pdo;
+	}
+}