refactor: add strtolower() to Request::getMethod()

The $upper functionality will be removed.

Author: kenjis

system/CodeIgniter.php

@@ -318,7 +318,7 @@ public function run(?RouteCollectionInterface $routes = null, bool $returnRespon
 
         $this->spoofRequestMethod();
 
-        if ($this->request instanceof IncomingRequest && $this->request->getMethod() === 'cli') {
+        if ($this->request instanceof IncomingRequest && strtolower($this->request->getMethod()) === 'cli') {
             $this->response->setStatusCode(405)->setBody('Method Not Allowed');
 
             return $this->sendResponse();
@@ -1047,7 +1047,7 @@ public function storePreviousURL($uri)
     public function spoofRequestMethod()
     {
         // Only works with POSTED forms
-        if ($this->request->getMethod() !== 'post') {
+        if (strtolower($this->request->getMethod()) !== 'post') {
             return;
         }
 

system/Router/Router.php

@@ -126,7 +126,7 @@ public function __construct(RouteCollectionInterface $routes, ?Request $request
         $this->controller = $this->collection->getDefaultController();
         $this->method     = $this->collection->getDefaultMethod();
 
-        $this->collection->setHTTPVerb($request->getMethod() ?? strtolower($_SERVER['REQUEST_METHOD']));
+        $this->collection->setHTTPVerb(strtolower($request->getMethod() ?? $_SERVER['REQUEST_METHOD']));
 
         $this->translateURIDashes = $this->collection->shouldTranslateURIDashes();
 

system/Validation/Validation.php

@@ -354,7 +354,7 @@ public function withRequest(RequestInterface $request): ValidationInterface
             return $this;
         }
 
-        if (in_array($request->getMethod(), ['put', 'patch', 'delete'], true)
+        if (in_array(strtolower($request->getMethod()), ['put', 'patch', 'delete'], true)
             && strpos($request->getHeaderLine('Content-Type'), 'multipart/form-data') === false
         ) {
             $this->data = $request->getRawInput();