[5.5] Make Request::validate() return value of parent key (#20974)

*              make Request::validate return values of parent key in case rules has nested

* re-order

*    use helper

*         handle different places where validate returns data

src/Illuminate/Foundation/Http/FormRequest.php

@@ -172,9 +172,11 @@ protected function failedAuthorization()
      */
     public function validated()
     {
-        return $this->only(array_keys(
-            $this->container->call([$this, 'rules'])
-        ));
+        $rules = $this->container->call([$this, 'rules']);
+
+        return $this->only(collect($rules)->keys()->map(function($rule){
+            return str_contains($rule, '.') ? explode('.', $rule)[0] : $rule;
+        })->unique()->toArray());
     }
 
     /**

src/Illuminate/Foundation/Providers/FoundationServiceProvider.php

@@ -38,7 +38,10 @@ public function registerRequestValidate()
         Request::macro('validate', function (array $rules, ...$params) {
             validator()->validate($this->all(), $rules, ...$params);
 
-            return $this->only(array_keys($rules));
+
+            return $this->only(collect($rules)->keys()->map(function($rule){
+                return str_contains($rule, '.') ? explode('.', $rule)[0] : $rule;
+            })->unique()->toArray());
         });
     }
 }

src/Illuminate/Foundation/Validation/ValidatesRequests.php

@@ -25,9 +25,9 @@ public function validateWith($validator, Request $request = null)
 
         $validator->validate();
 
-        return $request->only(
-            array_keys($validator->getRules())
-        );
+        return $request->only(collect($validator->getRules())->keys()->map(function($rule){
+                return str_contains($rule, '.') ? explode('.', $rule)[0] : $rule;
+            })->unique()->toArray());
     }
 
     /**
@@ -46,7 +46,9 @@ public function validate(Request $request, array $rules,
              ->make($request->all(), $rules, $messages, $customAttributes)
              ->validate();
 
-        return $request->only(array_keys($rules));
+        return $request->only(collect($rules)->keys()->map(function($rule){
+            return str_contains($rule, '.') ? explode('.', $rule)[0] : $rule;
+        })->unique()->toArray());
     }
 
     /**