From 530e229ba69207940ac47deaaffa60c161a28f5e Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Fri, 13 Feb 2026 15:23:17 +0000
Subject: [PATCH 1/2] Initial plan


From 4d9f918e3f03d480da0abb49db59710d1ccd4f6e Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Fri, 13 Feb 2026 15:29:15 +0000
Subject: [PATCH 2/2] Fix TypeError when using preg_match with integer keys in
 pattern properties

Co-authored-by: DannyvdSluijs <618940+DannyvdSluijs@users.noreply.github.com>
---
 .../Constraints/ObjectConstraint.php          |  2 +-
 tests/Constraints/PatternPropertiesTest.php   | 37 +++++++++++++++++++
 2 files changed, 38 insertions(+), 1 deletion(-)

diff --git a/src/JsonSchema/Constraints/ObjectConstraint.php b/src/JsonSchema/Constraints/ObjectConstraint.php
index c2c614a9..0e1252e3 100644
--- a/src/JsonSchema/Constraints/ObjectConstraint.php
+++ b/src/JsonSchema/Constraints/ObjectConstraint.php
@@ -61,7 +61,7 @@ public function validatePatternProperties($element, ?JsonPointer $path, $pattern
                 continue;
             }
             foreach ($element as $i => $value) {
-                if (preg_match($fullRegex, $i)) {
+                if (preg_match($fullRegex, (string) $i)) {
                     $matches[] = $i;
                     $this->checkUndefined($value, $schema ?: new \stdClass(), $path, $i, in_array($i, $this->appliedDefaults));
                 }
diff --git a/tests/Constraints/PatternPropertiesTest.php b/tests/Constraints/PatternPropertiesTest.php
index a4042602..ec83ccec 100644
--- a/tests/Constraints/PatternPropertiesTest.php
+++ b/tests/Constraints/PatternPropertiesTest.php
@@ -197,4 +197,41 @@ public function getValidTests(): \Generator
             ])
         ];
     }
+
+    public function getValidForAssocTests(): \Generator
+    {
+        // First yield all the regular valid tests
+        yield from $this->getValidTests();
+
+        // OpenAPI-like scenario with numeric keys (HTTP status codes)
+        // When JSON is decoded with associative=true, numeric keys become integers
+        yield 'validates OpenAPI responses with numeric status codes using assoc arrays' => [
+            json_encode([
+                'responses' => [
+                    '200' => [
+                        'description' => 'OK'
+                    ],
+                    '404' => [
+                        'description' => 'Not Found'
+                    ]
+                ]
+            ]),
+            json_encode([
+                'type' => 'object',
+                'properties' => [
+                    'responses' => [
+                        'type' => 'object',
+                        'patternProperties' => [
+                            '^[0-9]+$' => [
+                                'type' => 'object',
+                                'properties' => [
+                                    'description' => ['type' => 'string']
+                                ]
+                            ]
+                        ]
+                    ]
+                ]
+            ])
+        ];
+    }
 }