From a17e84f2f7c50c5bb3847bc709578ba49ebb3f3f Mon Sep 17 00:00:00 2001
From: George Peter Banyard <girgias@php.net>
Date: Fri, 21 Jul 2023 11:56:15 +0100
Subject: [PATCH] libxml_get_external_entity_loader(): test for incompatible
 resource being loaded (#11728)

A stream resource is expected to be returned by the handler.
---
 ...nal_entity_loader_error_callback_name.phpt | 43 +++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 ext/libxml/tests/libxml_get_external_entity_loader_error_callback_name.phpt

diff --git a/ext/libxml/tests/libxml_get_external_entity_loader_error_callback_name.phpt b/ext/libxml/tests/libxml_get_external_entity_loader_error_callback_name.phpt
new file mode 100644
index 00000000000..1bdbbfb5b81
--- /dev/null
+++ b/ext/libxml/tests/libxml_get_external_entity_loader_error_callback_name.phpt
@@ -0,0 +1,43 @@
+--TEST--
+libxml_get_external_entity_loader() display correct callable name
+--EXTENSIONS--
+dom
+dba
+--FILE--
+<?php
+
+$xml = <<<XML
+<!DOCTYPE foo PUBLIC "-//FOO/BAR" "http://example.com/foobar">
+<foo>bar</foo>
+XML;
+
+$dtd = <<<DTD
+<!ELEMENT foo (#PCDATA)>
+DTD;
+
+class Handler {
+	public function handle($public, $system, $context) {
+	    $file = __DIR__ . '/db.dba';
+		return dba_open($file, 'n');
+	}
+}
+
+$o = new Handler();
+libxml_set_external_entity_loader([$o, 'handle']);
+$dd = new DOMDocument;
+$r = $dd->loadXML($xml);
+
+try {
+    var_dump($dd->validate());
+} catch (\Throwable $e) {
+    var_dump($e->getMessage());
+}
+
+?>
+--CLEAN--
+<?php
+$file = __DIR__ . '/db.dba';
+unlink($file);
+?>
+--EXPECT--
+string(73) "DOMDocument::validate(): supplied resource is not a valid stream resource"