Use more modern XMLHttpRequest over XmlHttpRequest

Author: samsonasik

spec/Middleware/MezzioSpec.php

@@ -327,7 +327,7 @@
                 );
 
                 $request = $this->request;
-                $request  = $request->withHeader('X-Requested-With', 'XmlHttpRequest');
+                $request  = $request->withHeader('X-Requested-With', 'XMLHttpRequest');
 
                 $handler  = Double::instance(['implements' => RequestHandlerInterface::class]);
                 allow($handler)->toReceive('handle')->with($request)->andRun(function (): never {
@@ -364,7 +364,7 @@
                 );
 
                 $request  = $this->request;
-                $request  = $request->withHeader('X-Requested-With', 'XmlHttpRequest');
+                $request  = $request->withHeader('X-Requested-With', 'XMLHttpRequest');
 
                 $handler  = Double::instance(['implements' => RequestHandlerInterface::class]);
                 allow($handler)->toReceive('handle')->with($request)->andRun(function (): never {
@@ -401,7 +401,7 @@
                 );
 
                 $request  = $this->request;
-                $request  = $request->withHeader('X-Requested-With', 'XmlHttpRequest');
+                $request  = $request->withHeader('X-Requested-With', 'XMLHttpRequest');
 
                 $handler  = Double::instance(['implements' => RequestHandlerInterface::class]);
                 allow($handler)->toReceive('handle')->with($request)->andRun(function (): never {
@@ -436,7 +436,7 @@
             );
 
             $request  = $this->request;
-            $request  = $request->withHeader('X-Requested-With', 'XmlHttpRequest');
+            $request  = $request->withHeader('X-Requested-With', 'XMLHttpRequest');
 
             $handler  = Double::instance(['implements' => RequestHandlerInterface::class]);
             allow($handler)->toReceive('handle')->with($request)->andRun(function () use ($exception): never {

src/Middleware/Mezzio.php

@@ -101,7 +101,7 @@ private function showDefaultView(): Response|HtmlResponse
         /** @var  ServerRequestInterface $request */
         $request          = $this->request;
         $isXmlHttpRequest = $request->hasHeader('X-Requested-With')
-            && $request->getHeaderLine('X-Requested-With') === 'XmlHttpRequest';
+            && $request->getHeaderLine('X-Requested-With') === 'XMLHttpRequest';
 
         if (
             $isXmlHttpRequest &&