We still see deprecated function errors on pages with images displayed with Colorbox 2.1.1 and PHP 8.1.18. It seems like the fix from #3355723 doesn't solve this issue.
Deprecated function: strlen(): Passing null to parameter #1 ($string) of type string is deprecated in Drupal\Component\Utility\Unicode::validateUtf8() (line 395 of core/lib/Drupal/Component/Utility/Unicode.php).
Drupal\Component\Utility\Unicode::validateUtf8(NULL) (Line: 65)
Drupal\Component\Utility\Xss::filter(NULL) (Line: 432)
_colorbox_formatter_get_caption(Array) (Line: 140)
template_preprocess_colorbox_formatter(Array, 'colorbox_formatter', Array)
call_user_func_array('template_preprocess_colorbox_formatter', Array) (Line: 261)
Drupal\Core\Theme\ThemeManager->render('colorbox_formatter', Array) (Line: 491)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 248)
Drupal\Core\Render\Renderer->render(Array) (Line: 974)
Drupal\views\Plugin\views\field\EntityField->render_item(0, Array) (Line: 1214)
Drupal\views\Plugin\views\field\FieldPluginBase->advancedRender(Object) (Line: 238)
template_preprocess_views_view_field(Array, 'views_view_field', Array)
call_user_func_array('template_preprocess_views_view_field', Array) (Line: 261)
Drupal\Core\Theme\ThemeManager->render('views_view_field', Array) (Line: 491)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 248)
Drupal\Core\Render\Renderer->render(Array) (Line: 1796)
Drupal\views\Plugin\views\field\FieldPluginBase->theme(Object) (Line: 767)
Drupal\views\Plugin\views\style\StylePluginBase->elementPreRenderRow(Array)
call_user_func_array(Array, Array) (Line: 113)
Drupal\Core\Render\Renderer->doTrustedCallback(Array, Array, 'Render #pre_render callbacks must be methods of a class that implements \Drupal\Core\Security\TrustedCallbackInterface or be an anonymous function. The callback was %s. See https://www.drupal.org/node/2966725', 'exception', 'Drupal\Core\Render\Element\RenderCallbackInterface') (Line: 870)
Drupal\Core\Render\Renderer->doCallback('#pre_render', Array, Array) (Line: 432)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 248)
Drupal\Core\Render\Renderer->render(Array) (Line: 706)
Drupal\views\Plugin\views\style\StylePluginBase->renderFields(Array) (Line: 572)
Drupal\views\Plugin\views\style\StylePluginBase->renderGrouping(Array, Array) (Line: 84)
Drupal\blazy\Plugin\views\style\BlazyViews->render() (Line: 2177)
Drupal\views\Plugin\views\display\DisplayPluginBase->render() (Line: 1592)
Drupal\views\ViewExecutable->render() (Line: 394)
Drupal\eva\Plugin\views\display\Eva->execute() (Line: 1689)
Drupal\views\ViewExecutable->executeDisplay('entity_view_1', Array) (Line: 81)
Drupal\views\Element\View::preRenderViewElement(Array) (Line: 115)
eva_entity_view(Array, Object, Object, 'full')
call_user_func_array(Object, Array) (Line: 416)
Drupal\Core\Extension\ModuleHandler->Drupal\Core\Extension\{closure}(Object, 'eva') (Line: 395)
Drupal\Core\Extension\ModuleHandler->invokeAllWith('entity_view', Object) (Line: 423)
Drupal\Core\Extension\ModuleHandler->invokeAll('entity_view', Array) (Line: 289)
Drupal\Core\Entity\EntityViewBuilder->buildMultiple(Array) (Line: 239)
Drupal\Core\Entity\EntityViewBuilder->build(Array)
call_user_func_array(Array, Array) (Line: 113)
Drupal\Core\Render\Renderer->doTrustedCallback(Array, Array, 'Render #pre_render callbacks must be methods of a class that implements \Drupal\Core\Security\TrustedCallbackInterface or be an anonymous function. The callback was %s. See https://www.drupal.org/node/2966725', 'exception', 'Drupal\Core\Render\Element\RenderCallbackInterface') (Line: 870)
Drupal\Core\Render\Renderer->doCallback('#pre_render', Array, Array) (Line: 432)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 248)
Drupal\Core\Render\Renderer->render(Array, ) (Line: 238)
Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}() (Line: 638)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 239)
Drupal\Core\Render\MainContent\HtmlRenderer->prepare(Array, Object, Object) (Line: 128)
Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse(Array, Object, Object) (Line: 90)
Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray(Object, 'kernel.view', Object)
call_user_func(Array, Object, 'kernel.view', Object) (Line: 111)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch(Object, 'kernel.view') (Line: 186)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 76)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 53)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 28)
Drupal\Core\StackMiddleware\ContentLength->handle(Object, 1, 1) (Line: 191)
Drupal\page_cache\StackMiddleware\PageCache->fetch(Object, 1, 1) (Line: 128)
Drupal\page_cache\StackMiddleware\PageCache->lookup(Object, 1, 1) (Line: 82)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 36)
Drupal\Core\StackMiddleware\AjaxPageState->handle(Object, 1, 1) (Line: 51)
Drupal\Core\StackMiddleware\StackedHttpKernel->handle(Object, 1, 1) (Line: 741)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)Active
2.1
Code
Hi @scslweb, thanks for the report.
I'm unable to reproduce this issue with empty alt text passing a NULL to Xss::filter(). When I have empty alt text, the string "" is passed as designed.
Can you provide a set of steps to reproduce this issue on a clean Drupal install?
Thanks!