SwissQR: add Sprain\SwissQrBill and dependencies

htdocs/includes/symfony/intl/Data/Util/RecursiveArrayAccess.php

@@ -0,0 +1,48 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Intl\Data\Util;
+
+use Symfony\Component\Intl\Exception\OutOfBoundsException;
+
+/**
+ * @author Bernhard Schussek <bschussek@gmail.com>
+ *
+ * @internal
+ */
+class RecursiveArrayAccess
+{
+    public static function get(mixed $array, array $indices)
+    {
+        foreach ($indices as $index) {
+            // Use array_key_exists() for arrays, isset() otherwise
+            if (\is_array($array)) {
+                if (\array_key_exists($index, $array)) {
+                    $array = $array[$index];
+                    continue;
+                }
+            } elseif ($array instanceof \ArrayAccess) {
+                if (isset($array[$index])) {
+                    $array = $array[$index];
+                    continue;
+                }
+            }
+
+            throw new OutOfBoundsException(sprintf('The index "%s" does not exist.', $index));
+        }
+
+        return $array;
+    }
+
+    private function __construct()
+    {
+    }
+}