✨ Rewrite for Kirby

site/plugins/kirby-highlighter/extensions/fieldmethods.php

@@ -0,0 +1,23 @@
+<?php
+
+if (!function_exists('is_base64_string_s')) {
+    // https://stackoverflow.com/a/51877882
+    function is_base64_string_s(string $str, $enc = ['UTF-8', 'ASCII'])
+    {
+        return !(($b = base64_decode($str, true)) === false) && in_array(mb_detect_encoding($b), $enc);
+    }
+}
+
+return [
+    'fromBase64' => function ($field) {
+        if ($field->isNotEmpty()) {
+            $value = trim((string)$field->value());
+
+            if (is_base64_string_s($value)) {
+                $field->value = base64_decode($value);
+            }
+        }
+
+        return $field;
+    },
+];