up

src/ApiKernel.php

@@ -970,12 +970,7 @@ class ApiKernel
                     $node->removeChild($node->firstChild);
                 }
 
-                $fragment = $doc->createDocumentFragment();
-                if (@$fragment->appendXML($replacement)) {
-                    $node->appendChild($fragment);
-                } else {
-                    $node->appendChild($doc->createTextNode($replacement));
-                }
+                $this->appendHtmlToNode($doc, $node, $replacement);
             }
         }
 
@@ -988,4 +983,44 @@ class ApiKernel
         }
         return $output;
     }
+
+    private function appendHtmlToNode(DOMDocument $targetDoc, DOMElement $node, string $html): void
+    {
+        if (trim($html) === '') return;
+
+        $flags = 0;
+        if (defined('LIBXML_HTML_NOIMPLIED')) {
+            $flags |= LIBXML_HTML_NOIMPLIED;
+        }
+        if (defined('LIBXML_HTML_NODEFDTD')) {
+            $flags |= LIBXML_HTML_NODEFDTD;
+        }
+
+        $fragmentDoc = new DOMDocument('1.0', 'UTF-8');
+        libxml_use_internal_errors(true);
+        $wrapped = '<div id="fragment-wrapper">' . $html . '</div>';
+        $loaded = @$fragmentDoc->loadHTML('<?xml encoding="utf-8"?>' . $wrapped, $flags);
+        libxml_clear_errors();
+
+        if ($loaded) {
+            $wrapper = $fragmentDoc->getElementById('fragment-wrapper');
+            if ($wrapper) {
+                $children = [];
+                if ($wrapper->hasChildNodes()) {
+                    foreach ($wrapper->childNodes as $child) {
+                        $children[] = $child;
+                    }
+                }
+                foreach ($children as $child) {
+                    $imported = $targetDoc->importNode($child, true);
+                    if ($imported) {
+                        $node->appendChild($imported);
+                    }
+                }
+                return;
+            }
+        }
+
+        $node->appendChild($targetDoc->createTextNode($html));
+    }
 }