fix: add uploaded and is_image to field-referencing validation rules

Author: gr8man

system/Validation/Validation.php

@@ -42,6 +42,8 @@ class Validation implements ValidationInterface
         'differs',
         'required_with',
         'required_without',
+        'uploaded',
+        'is_image',
     ];
 
     /**

tests/system/Validation/ValidationTest.php

@@ -1891,13 +1891,27 @@ public function testParamResolvesFieldLabelForFieldReferenceRules(): void
                 'label' => 'Password Confirmation',
                 'rules' => 'matches[password]',
             ],
+            'userfile' => [
+                'label' => 'Profile Avatar',
+                'rules' => 'permit_empty',
+            ],
+            'avatar' => [
+                'label' => 'Avatar',
+                'rules' => 'uploaded[userfile]',
+                'errors' => [
+                    'uploaded' => 'Invalid file uploaded for {param}.',
+                ],
+            ],
         ];
 
         $this->validation->setRules($rules);
 
         $this->assertFalse($this->validation->run(['password' => 'abc', 'password_confirmation' => 'def']));
         $this->assertSame(
-            ['password_confirmation' => 'The Password Confirmation field does not match the Password field.'],
+            [
+                'password_confirmation' => 'The Password Confirmation field does not match the Password field.',
+                'avatar' => 'Invalid file uploaded for Profile Avatar.',
+            ],
             $this->validation->getErrors(),
         );
     }

user_guide_src/source/changelogs/v4.7.5.rst

@@ -61,7 +61,7 @@ Bugs Fixed
 - **I18n:** Fixed a bug where ``Time::today()``, ``Time::yesterday()``, and ``Time::tomorrow()`` ignored the specified ``$timezone`` and ``setTestNow()`` when calculating the day.
 - **Logger:** Fixed a bug where interpolating a log message with array or non-stringable context values could raise PHP warnings or errors.
 - **Validation:** Fixed a bug where ``valid_cc_number`` accepted non-digit characters (e.g., a decimal point) in the card number. Such values could pass the Luhn check and triggered an ``Undefined array key`` warning inside it; the number is now checked with ``ctype_digit()``.
-- **Validation:** Fixed a bug where a rule parameter that was not a field reference (e.g., a numeric limit) could resolve another field's label and leak it into the error message when it matched a defined field name. Label substitution now only applies to field-referencing rules (``matches``, ``differs``, ``required_with``, ``required_without``).
+- **Validation:** Fixed a bug where a rule parameter that was not a field reference (e.g., a numeric limit) could resolve another field's label and leak it into the error message when it matched a defined field name. Label substitution now only applies to field-referencing rules (``matches``, ``differs``, ``required_with``, ``required_without``, ``uploaded``, ``is_image``).
 
 See the repo's
 `CHANGELOG.md <https://github.com/codeigniter4/CodeIgniter4/blob/develop/CHANGELOG.md>`_