1--TEST--
2libxml_disable_entity_loader()
3--SKIPIF--
4<?php
5if (!extension_loaded('libxml')) die('skip libxml extension not available');
6if (!extension_loaded('dom')) die('skip dom extension not available');
7if (LIBXML_VERSION >= 20912) die('skip For libxml2 < 2.9.12 only');
8?>
9--FILE--
10<?php
11
12$xml = <<<EOT
13<?xml version="1.0" encoding="UTF-8"?>
14<!DOCTYPE test [<!ENTITY xxe SYSTEM "XXE_URI">]>
15<foo>&xxe;</foo>
16EOT;
17
18$dir = str_replace('\\', '/', __DIR__);
19$xml = str_replace('XXE_URI', $dir . '/libxml_disable_entity_loader_payload.txt', $xml);
20
21function parseXML($xml) {
22  $doc = new DOMDocument();
23  $doc->resolveExternals = true;
24  $doc->substituteEntities = true;
25  $doc->validateOnParse = false;
26  $doc->loadXML($xml, 0);
27  return $doc->saveXML();
28}
29
30var_dump(strpos(parseXML($xml), 'SECRET_DATA') !== false);
31var_dump(libxml_disable_entity_loader(true));
32var_dump(strpos(parseXML($xml), 'SECRET_DATA') === false);
33
34echo "Done\n";
35?>
36--EXPECTF--
37bool(true)
38bool(false)
39
40Warning: DOMDocument::loadXML(): I/O warning : failed to load external entity "%s" in %s on line %d
41
42Warning: DOMDocument::loadXML(): Failure to process entity xxe in Entity, line: %d in %s on line %d
43
44Warning: DOMDocument::loadXML(): Entity 'xxe' not defined in Entity, line: %d in %s on line %d
45bool(true)
46Done
47