From c8cadb413101949316b0759510a1125580259647 Mon Sep 17 00:00:00 2001
From: Tybaze <tybaze@users.noreply.github.com>
Date: Tue, 14 Feb 2023 18:48:48 +0100
Subject: [PATCH] Fix PHP8.1 sfForm - Unsupported operand types: array + null
 on sfForm::updateValues()

Avoid error :
Fatal error: Uncaught TypeError: Unsupported operand types: array + null in lib\form\sfForm.class.php:319

Step to reproduce :
$form = new sfForm();
$form->updateValues(array('foo' => 'value'));

PHP 5.3 coding style

May use sfForm::getValues(), but as sfForm::updateValues() is a hack, it could be used before bind ($this->isBound = true);
---
 lib/form/sfForm.class.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/form/sfForm.class.php b/lib/form/sfForm.class.php
index 2db45bbde..0c520cdd4 100644
--- a/lib/form/sfForm.class.php
+++ b/lib/form/sfForm.class.php
@@ -316,7 +316,7 @@ public function isBound()
    */
   public function updateValues(array $values)
   {
-    $this->values = $values + $this->values;
+    $this->values = $values + (isset($this->values) ? $this->values : array());
 
     $this->updateValuesEmbeddedForms($values);
   }