Move some files and add a swear filter

incl/db.php

@@ -0,0 +1,15 @@
+<?php
+function connectToDatabase() {
+    include __DIR__ . "/../config/connection.php";
+    try {
+        $dsn = "mysql:host=$dbhost;dbname=$dbname;port=$dbport";
+        $options = [
+            PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
+            PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
+        ];
+        $conn = new PDO($dsn, $dbusername, $dbpass, $options);
+    } catch (PDOException $e) {
+        die("Failed to connect to database: " . $e->getMessage());
+    }
+    return $conn;
+}