Add a method to test if the request comes from ajax

Author: na2axl

src/WaterPipe/HTTP/Request/Request.php

@@ -129,6 +129,16 @@ public function setBody(RequestData $body): void
         $this->_body = $body;
     }
 
+    /**
+     * Checks if the current request is from Ajax.
+     *
+     * @return bool
+     */
+    public function isAjax(): bool
+    {
+        return (!empty($_SERVER["HTTP_X_REQUESTED_WITH"]) && strtolower($_SERVER["HTTP_X_REQUESTED_WITH"]) === "xmlhttprequest");
+    }
+
     /**
      * Captures the current request.
      *