Intersect Method for Illuminate Request (#13167)

src/Illuminate/Http/Request.php

@@ -375,6 +375,17 @@ public function except($keys)
         return $results;
     }
 
+    /**
+     * Intersect an array of items with the input data.
+     *
+     * @param  array|mixed  $keys
+     * @return array
+     */
+    public function intersect($keys)
+    {
+        return array_filter($this->only($keys));
+    }
+
     /**
      * Retrieve a query string item from the request.
      *