Part on DatabaseClass finished

Database.php

@@ -0,0 +1,18 @@
+<?php
+// connect to MySQL database.
+class Database {
+    public $connection;
+
+    public function __construct()
+    {
+        $dsn = "mysql:host=localhost;port=3306;dbname=myapp;charset=utf8mb4";
+        $username = 'appUser';
+        $password = 'password';
+        $this->connection  = new PDO($dsn, $username, $password);
+    }
+    public function query($query) {
+        $statement = $this->connection->prepare($query);
+        $statement->execute();
+        return $statement;
+    }
+}