From b4b073e8a1f12751be8ae0c97a8b182e7fa25331 Mon Sep 17 00:00:00 2001
From: michalsn <michal@sniatala.pl>
Date: Thu, 7 May 2026 16:09:24 +0200
Subject: [PATCH 1/2] fix: support third-party loggers in toolbar logs
 collector

---
 system/Debug/Toolbar/Collectors/Logs.php         |  8 ++++++--
 .../system/Debug/Toolbar/Collectors/LogsTest.php | 16 ++++++++++++++++
 2 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/system/Debug/Toolbar/Collectors/Logs.php b/system/Debug/Toolbar/Collectors/Logs.php
index f9fdabecbff1..92562e81e629 100644
--- a/system/Debug/Toolbar/Collectors/Logs.php
+++ b/system/Debug/Toolbar/Collectors/Logs.php
@@ -92,9 +92,13 @@ protected function collectLogs()
             return $this->data;
         }
 
-        $cache = service('logger')->logCache;
+        $logger = service('logger');
 
-        $this->data = $cache ?? [];
+        if (! property_exists($logger, 'logCache')) {
+            return $this->data;
+        }
+
+        $this->data = $logger->logCache;
 
         return $this->data;
     }
diff --git a/tests/system/Debug/Toolbar/Collectors/LogsTest.php b/tests/system/Debug/Toolbar/Collectors/LogsTest.php
index c239d0d422ba..a89fc878260c 100644
--- a/tests/system/Debug/Toolbar/Collectors/LogsTest.php
+++ b/tests/system/Debug/Toolbar/Collectors/LogsTest.php
@@ -18,6 +18,8 @@
 use Config\Logger as LoggerConfig;
 use Config\Services;
 use PHPUnit\Framework\Attributes\Group;
+use Psr\Log\AbstractLogger;
+use Stringable;
 
 /**
  * @internal
@@ -68,4 +70,18 @@ public function testNotEmpty(): void
         $collector = new Logs();
         $this->assertFalse($collector->isEmpty());
     }
+
+    public function testEmptyWithThirdPartyLogger(): void
+    {
+        Services::injectMock('logger', new class () extends AbstractLogger {
+            public function log($level, string|Stringable $message, array $context = []): void
+            {
+            }
+        });
+
+        $collector = new Logs();
+
+        $this->assertTrue($collector->isEmpty());
+        $this->assertSame(['logs' => []], $collector->display());
+    }
 }

From 7c53bca06a4a3bdd02964bbb9fe31b828daa49fb Mon Sep 17 00:00:00 2001
From: michalsn <michal@sniatala.pl>
Date: Thu, 7 May 2026 16:13:02 +0200
Subject: [PATCH 2/2] add changelog

---
 user_guide_src/source/changelogs/v4.7.3.rst | 1 +
 1 file changed, 1 insertion(+)

diff --git a/user_guide_src/source/changelogs/v4.7.3.rst b/user_guide_src/source/changelogs/v4.7.3.rst
index 06418cf9e5e8..e3600a814369 100644
--- a/user_guide_src/source/changelogs/v4.7.3.rst
+++ b/user_guide_src/source/changelogs/v4.7.3.rst
@@ -42,6 +42,7 @@ Bugs Fixed
 - **Common:** Fixed a bug where the ``command()`` helper function did not properly clean up output buffers, which could lead to risky tests when exceptions were thrown.
 - **Database:** Fixed a bug where the SQLSRV driver's decrement method was adding instead of subtracting the decrement value when ``$castTextToInt`` was false.
 - **Kint:** Fixed a bug where stale Content Security Policy nonces were reused in worker mode, causing browser CSP violations for Debug Toolbar assets.
+- **Toolbar:** Fixed a bug where the Logs collector raised an undefined property error when using a third-party PSR-3 logger.
 - **Time:** Fixed a bug where ``Time::createFromTimestamp()`` could fail for microsecond timestamps when ``LC_NUMERIC`` used a comma decimal separator.
 - **Validation:** Fixed a bug where ``Validation::getValidated()`` dropped fields whose validated value was explicitly ``null``.