Slight refactor to return an empty string instead of null

Author: simonpioli

src/NullableXMLElement.php renamed to src/TypedXMLElement.php

@@ -5,7 +5,7 @@
 use JsonSerializable;
 use SimpleXMLElement;
 
-class NullableXMLElement extends SimpleXMLElement implements JsonSerializable
+class TypedXMLElement extends SimpleXMLElement implements JsonSerializable
 {
  /**
  * @inheritDoc
@@ -43,7 +43,7 @@ public function jsonSerialize(): mixed
 
  // return empty elements as NULL (self-closing or empty tags)
  if ($array === []) {
- $array = null;
+ $array = '';
  }
 
  return $array;

src/XmlRequestMiddleware.php

@@ -16,7 +16,7 @@ class XmlRequestMiddleware
  public function handle($request, Closure $next)
  {
  $request->merge($request->xml(true));
- 
+
  return $next($request);
  }
-}
+}

src/XmlRequestServiceProvider.php

@@ -24,7 +24,7 @@ public function register()
  return $assoc ? [] : new \stdClass;
  }
  // Returns the xml input from a request
- $xml = simplexml_load_string($content, NullableXMLElement::class, LIBXML_NOCDATA);
+ $xml = simplexml_load_string($content, TypedXMLElement::class, LIBXML_NOCDATA);
  $json = json_encode($xml);
 
  return json_decode($json, $assoc);