From 71bdb1af1a66de8b7a5400beb6b792a9e5bf1fe1 Mon Sep 17 00:00:00 2001
From: Antoine Veldhoven <antoine@invitado.nl>
Date: Sun, 18 Oct 2026 21:44:02 +0200
Subject: [PATCH] Allow for-loop for stdClass-objects.

---
 src/Extension/CoreExtension.php       |  8 ++++++
 tests/Fixtures/tags/for/stdClass.test | 35 +++++++++++++++++++++++++++
 2 files changed, 43 insertions(+)
 create mode 100644 tests/Fixtures/tags/for/stdClass.test

diff --git a/src/Extension/CoreExtension.php b/src/Extension/CoreExtension.php
index 410597bbb1e..60f2a06c8eb 100644
--- a/src/Extension/CoreExtension.php
+++ b/src/Extension/CoreExtension.php
@@ -951,6 +951,10 @@ public static function keys($array): array
             return $keys;
         }
 
+        if ($array instanceof \stdClass) {
+            $array = (array) $array;
+        }
+
         if (!\is_array($array)) {
             return [];
         }
@@ -1396,6 +1400,10 @@ public static function ensureTraversable($seq)
             return $seq;
         }
 
+        if ($seq instanceof \stdClass) {
+            return (array) $seq;
+        }
+
         return [];
     }
 
diff --git a/tests/Fixtures/tags/for/stdClass.test b/tests/Fixtures/tags/for/stdClass.test
new file mode 100644
index 00000000000..22e0973700b
--- /dev/null
+++ b/tests/Fixtures/tags/for/stdClass.test
@@ -0,0 +1,35 @@
+--TEST--
+"for" tag iterates over stdClass objects
+--TEMPLATE--
+{% for item in stdClass.obj %}
+  * {{ item }}
+  * {{ loop.index }}/{{ loop.index0 }}
+  * {{ loop.first }}
+
+{% endfor %}
+
+{% for key, value in stdClass.obj %}
+  * {{ key }}/{{ value }}
+{% endfor %}
+
+{% for key in stdClass.obj|keys %}
+  * {{ key }}
+{% endfor %}
+--DATA--
+return ['stdClass' => (object) ['obj' => (object) ['key1' => 'one', 'key2' => 'two']]]
+--EXPECT--
+  * one
+  * 1/0
+  * 1
+
+  * two
+  * 2/1
+  * 
+
+
+  * key1/one
+  * key2/two
+
+  * key1
+  * key2
+