Fix compatibility issue, update class_alias to use DummyClassForClass…

…ExistsCheck

Replaced instances of \stdClass in class_alias calls with DummyClassForClassExistsCheck as before php 8.3 only user created class can be aliased.

Tests/DependencyInjection/Fixtures/DummyClassForClassExistsCheck.php

@@ -0,0 +1,16 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Bundle\MonologBundle\Tests\DependencyInjection\Fixtures;
+
+class DummyClassForClassExistsCheck
+{
+}

Tests/DependencyInjection/MonologExtensionTest.php

@@ -22,6 +22,7 @@
 use Symfony\Bundle\MonologBundle\Tests\DependencyInjection\Fixtures\AsMonologProcessor\FooProcessor;
 use Symfony\Bundle\MonologBundle\Tests\DependencyInjection\Fixtures\AsMonologProcessor\FooProcessorWithPriority;
 use Symfony\Bundle\MonologBundle\Tests\DependencyInjection\Fixtures\AsMonologProcessor\RedeclareMethodProcessor;
+use Symfony\Bundle\MonologBundle\Tests\DependencyInjection\Fixtures\DummyClassForClassExistsCheck;
 use Symfony\Bundle\MonologBundle\Tests\DependencyInjection\Fixtures\ServiceWithChannel;
 use Symfony\Component\Config\Definition\Exception\InvalidConfigurationException;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
@@ -189,7 +190,7 @@ public function testExceptionWhenUsingGelfWithoutPublisherHostname()
     public function testExceptionWhenUsingLegacyGelfImplementationWithUnsupportedEncoder(): void
     {
         if (!class_exists('Gelf\MessagePublisher')) {
-            class_alias(\stdClass::class, 'Gelf\MessagePublisher');
+            class_alias(DummyClassForClassExistsCheck::class, 'Gelf\MessagePublisher');
         }
 
         $container = new ContainerBuilder();
@@ -206,7 +207,7 @@ class_alias(\stdClass::class, 'Gelf\MessagePublisher');
     public function testLegacyGelfImplementationEncoderOption(array $config): void
     {
         if (!class_exists('Gelf\MessagePublisher')) {
-            class_alias(\stdClass::class, 'Gelf\MessagePublisher');
+            class_alias(DummyClassForClassExistsCheck::class, 'Gelf\MessagePublisher');
         }
 
         $container = $this->getContainer($config);
@@ -234,7 +235,7 @@ public function encoderOptionsProvider(): array
     public function testExceptionWhenUsingGelfWithInvalidEncoder(): void
     {
         if (!class_exists('Gelf\Transport\UdpTransport')) {
-            class_alias(\stdClass::class, 'Gelf\Transport\UdpTransport');
+            class_alias(DummyClassForClassExistsCheck::class, 'Gelf\Transport\UdpTransport');
         }
 
         $container = new ContainerBuilder();
@@ -251,7 +252,7 @@ class_alias(\stdClass::class, 'Gelf\Transport\UdpTransport');
     public function testGelfWithEncoder($encoderValue, $expectedClass): void
     {
         if (!class_exists('Gelf\Transport\UdpTransport')) {
-            class_alias(\stdClass::class, 'Gelf\Transport\UdpTransport');
+            class_alias(DummyClassForClassExistsCheck::class, 'Gelf\Transport\UdpTransport');
         }
 
         $container = $this->getContainer([['handlers' => ['gelf' => ['type' => 'gelf', 'publisher' => ['hostname' => 'localhost', 'encoder' => $encoderValue]]]]]);