Better structure

database.php

@@ -1,15 +1,35 @@
 <?php
-function openConnection() {
-  $dataAccess = parse_ini_file("phpCourse/configs/db.ini", true);
-  
-  $db = new PDO("mysql:host=" . $dataAccess["ZEDAT"]["host"] . 
-  ";dbname=" . $dataAccess["ZEDAT"]["database"] . ";charset=utf8", 
-  $dataAccess["ZEDAT"]["user"], $dataAccess["ZEDAT"]["passwd"], 
-  array(PDO::ATTR_PERSISTENT => false));
-  
-  $db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
-  $db->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);
-  
-  return $db;
+class DB extends PDO
+{
+  public function __construct($dsn, $username = null, $password = null, array $options = null)
+  {
+    parent::__construct($dsn, $username, $password, $options);
+  }
+
+  static function openConnection()
+  {
+    $conn = null;
+    try {
+      $dataAccess = parse_ini_file("configs/db.ini", true);
+
+      $conn = new PDO(
+        "mysql:host=" . $dataAccess["ZEDAT"]["host"] .
+          ";dbname=" . $dataAccess["ZEDAT"]["database"] . ";charset=utf8",
+        $dataAccess["ZEDAT"]["user"],
+        $dataAccess["ZEDAT"]["passwd"],
+        array(PDO::ATTR_PERSISTENT => false)
+      );
+
+      $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+      $conn->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);
+    } catch (PDOException $exc) {
+      echo $exc->getMessage();
+    }
+    return $conn;
+  }
+
+  static function closeConnection(&$conn)
+  {
+    $conn = null;
+  }
 }
-?>