From 776655104bf39039e4195a6d414280b225d913ac Mon Sep 17 00:00:00 2001
From: lacatoire <la.catoire@gmail.com>
Date: Mon, 16 Feb 2026 09:52:05 +0100
Subject: [PATCH] Fix GH-181: Empty title swallows sibling content

When a self-closing <title/> element appeared in DocBook XML,
transformFromMap() generated invalid HTML like <h3 class="title"/>
which browsers parse as an unclosed <h3>, swallowing all sibling content.

Emit a proper open+close pair (<h3 class="title"></h3>) instead.
---
 phpdotnet/phd/Format/Abstract/XHTML.php       |  5 +++-
 .../package/generic/data/empty_title_001.xml  |  7 +++++
 tests/package/generic/empty_title_001.phpt    | 29 +++++++++++++++++++
 3 files changed, 40 insertions(+), 1 deletion(-)
 create mode 100644 tests/package/generic/data/empty_title_001.xml
 create mode 100644 tests/package/generic/empty_title_001.phpt

diff --git a/phpdotnet/phd/Format/Abstract/XHTML.php b/phpdotnet/phd/Format/Abstract/XHTML.php
index 12f57171..4d67268f 100644
--- a/phpdotnet/phd/Format/Abstract/XHTML.php
+++ b/phpdotnet/phd/Format/Abstract/XHTML.php
@@ -31,7 +31,10 @@ public function transformFromMap($open, $tag, $name, $attrs, $props) {
                 $id = $attrs[Reader::XMLNS_XML]["id"];
                 $idstr = ' id="' .$id. '"';
             }
-            return '<' .$tag. ' class="' .$name. '"' . $idstr . ($props["empty"] ? '/' : "") . '>';
+            if ($props["empty"]) {
+                return '<' .$tag. ' class="' .$name. '"' . $idstr . '></' .$tag. '>';
+            }
+            return '<' .$tag. ' class="' .$name. '"' . $idstr . '>';
         }
         return '</' .$tag. '>';
     }
diff --git a/tests/package/generic/data/empty_title_001.xml b/tests/package/generic/data/empty_title_001.xml
new file mode 100644
index 00000000..56c13c1c
--- /dev/null
+++ b/tests/package/generic/data/empty_title_001.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<article xmlns="http://docbook.org/ns/docbook" xml:id="empty_title_test">
+ <section xml:id="empty-title-section">
+  <title/>
+  <simpara>Some content after empty title</simpara>
+ </section>
+</article>
diff --git a/tests/package/generic/empty_title_001.phpt b/tests/package/generic/empty_title_001.phpt
new file mode 100644
index 00000000..76dfd1b1
--- /dev/null
+++ b/tests/package/generic/empty_title_001.phpt
@@ -0,0 +1,29 @@
+--TEST--
+GH-181 Empty title should not swallow sibling content
+--FILE--
+<?php
+namespace phpdotnet\phd;
+
+require_once __DIR__ . "/../../setup.php";
+
+$xmlFile = __DIR__ . "/data/empty_title_001.xml";
+
+$config->xmlFile = $xmlFile;
+
+$format = new TestGenericChunkedXHTML($config, $outputHandler);
+$render = new TestRender(new Reader($outputHandler), $config, $format);
+
+$render->run();
+?>
+--EXPECTF--
+Filename: empty-title-section.html
+Content:
+<div id="empty-title-section" class="section">
+  <h2 class="title"></h2>
+  <p class="simpara">Some content after empty title</p>
+ </div>
+Filename: empty_title_test.html
+Content:
+<div id="empty_title_test" class="article">
+%A
+</div>