Issue #3250397 by alexpott, mondrake, ressa, daffie, xjm: DbLog triggers PHP deprecation on PHP8.1 when running from CLI

(cherry picked from commit 5948cfbca6)
(cherry picked from commit 21b92bdaa6)

core/lib/Drupal/Core/Logger/LoggerChannel.php

@@ -111,7 +111,7 @@ class LoggerChannel implements LoggerChannelInterface {
     if ($this->requestStack && $request = $this->requestStack->getCurrentRequest()) {
       $context['request_uri'] = $request->getUri();
       $context['referer'] = $request->headers->get('Referer', '');
-      $context['ip'] = $request->getClientIP();
+      $context['ip'] = $request->getClientIP() ?: '';
 
       if ($this->currentUser) {
         $context['uid'] = $this->currentUser->id();

core/tests/Drupal/Tests/Core/Command/QuickStartTest.php

@@ -116,6 +116,8 @@ class QuickStartTest extends TestCase {
     });
     // The progress bar uses STDERR to write messages.
     $this->assertStringContainsString('Congratulations, you installed Drupal!', $process->getErrorOutput());
+    // Ensure the command does not trigger any PHP deprecations.
+    $this->assertStringNotContainsString('Deprecated', $process->getErrorOutput());
     $this->assertNotFalse($port, "Web server running on port $port");
 
     // Give the server a couple of seconds to be ready.

core/tests/Drupal/Tests/Core/Logger/LoggerChannelTest.php

@@ -97,6 +97,39 @@ class LoggerChannelTest extends UnitTestCase {
     $this->assertEquals('3210', $index_order);
   }
 
+  /**
+   * Tests that $context['ip'] is a string even when the request's IP is NULL.
+   */
+  public function testNullIp(): void {
+    // Create a logger that will fail if $context['ip'] is not an empty string.
+    $logger = $this->createMock(LoggerInterface::class);
+    $expected = function ($context) {
+      return $context['channel'] == 'test' && $context['ip'] === '';
+    };
+    $logger->expects($this->once())
+      ->method('log')
+      ->with($this->anything(), 'Test message', $this->callback($expected));
+
+    // Set up a request stack that has a request that will return NULL when
+    // ::getClientIp() is called.
+    $requestStack = new RequestStack();
+    $request_mock = $this->getMockBuilder(Request::class)
+      ->onlyMethods(['getClientIp'])
+      ->getMock();
+    $request_mock->expects($this->any())
+      ->method('getClientIp')
+      ->willReturn(NULL);
+    $requestStack->push($request_mock);
+
+    // Set up the logger channel for testing.
+    $channel = new LoggerChannel('test');
+    $channel->addLogger($logger);
+    $channel->setRequestStack($requestStack);
+
+    // Perform the test.
+    $channel->log(rand(0, 7), 'Test message');
+  }
+
   /**
    * Data provider for self::testLog().
    */
@@ -117,14 +150,14 @@ class LoggerChannelTest extends UnitTestCase {
     // No request or account.
     $cases[] = [
       function ($context) {
-        return $context['channel'] == 'test' && empty($context['uid']) && empty($context['ip']);
+        return $context['channel'] == 'test' && empty($context['uid']) && $context['ip'] === '';
       },
     ];
     // With account but not request. Since the request is not available the
     // current user should not be used.
     $cases[] = [
       function ($context) {
-        return $context['uid'] === 0 && empty($context['ip']);
+        return $context['uid'] === 0 && $context['ip'] === '';
       },
       NULL,
       $account_mock,