Simple Route

exam2/vendor/database/database.php

@@ -0,0 +1,32 @@
+<?php
+
+class Database extends PDO
+{
+  private static array $instances = [];
+
+  protected function __construct($dsn, $username = null, $password = null, array $options = null)
+  {
+    parent::__construct($dsn, $username, $password, $options);
+  }
+
+  public static function getInstance(): Database
+  {
+    $cls = static::class;
+    if (!isset(self::$instances[$cls])) {
+      $dataAccess = Config::getDatabase();
+      self::$instances[$cls] = new static(
+        "mysql:host={$dataAccess["host"]};dbname={$dataAccess["database"]};charset={$dataAccess["charset"]}",
+        $dataAccess["user"],
+        $dataAccess["passwd"],
+        [
+          PDO::ATTR_PERSISTENT => false,
+          PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
+          PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
+          PDO::ATTR_EMULATE_PREPARES   => false,
+        ]
+      );
+    }
+
+    return self::$instances[$cls];
+  }
+}