First push

includes/db.php

@@ -0,0 +1,18 @@
+<?php
+require_once __DIR__ . '/../config.php';
+
+function db(): PDO {
+    static $pdo = null;
+    if ($pdo === null) {
+        $dsn = sprintf(
+            'mysql:host=%s;port=%d;dbname=%s;charset=utf8mb4',
+            DB_HOST, DB_PORT, DB_NAME
+        );
+        $pdo = new PDO($dsn, DB_USER, DB_PASS, [
+            PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,
+            PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
+            PDO::ATTR_EMULATE_PREPARES   => false,
+        ]);
+    }
+    return $pdo;
+}