Add missing properties to xsl stub

UPGRADING

@@ -43,6 +43,8 @@ PHP 8.4 UPGRADE NOTES
   . XSLTProcessor::setParameter() will now throw a ValueError when its arguments
     contain null bytes. This never actually worked correctly in the first place,
     which is why it throws an exception nowadays.
+  . The typed properties XSLTProcessor::$cloneDocument and
+    XSLTProcessor::$doXInclude are now declared.
 
 ========================================
 2. New Features

ext/xsl/php_xsl.stub.php

@@ -71,6 +71,10 @@
 
 class XSLTProcessor
 {
+    public bool $doXInclude = false;
+
+    public bool $cloneDocument = false;
+
     /**
      * @param DOMDocument|SimpleXMLElement $stylesheet
      * @tentative-return-type

ext/xsl/tests/cloneDocument.phpt

@@ -0,0 +1,45 @@
+--TEST--
+cloneDocument
+--EXTENSIONS--
+xsl
+dom
+--FILE--
+<?php
+
+$xml = new DOMDocument;
+$xml->loadXML('<?xml version="1.0"?><root><foo>hello</foo></root>');
+
+function test() {
+    global $xml;
+    $xml->documentElement->firstChild->textContent = "bye";
+}
+
+$xsl = new DOMDocument;
+$xsl->loadXML(<<<XML
+<?xml version="1.0"?>
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:php="http://php.net/xsl" version="1.0">
+    <xsl:template match="/root">
+        <xsl:value-of select="php:function('test')"/>
+        <xsl:value-of select="//root/foo"/>
+    </xsl:template>
+</xsl:stylesheet>
+XML);
+
+$xslt = new XSLTProcessor;
+$xslt->registerPHPFunctions();
+$xslt->cloneDocument = true;
+$xslt->importStylesheet($xsl);
+echo $xslt->transformToXml($xml);
+
+$xslt = new XSLTProcessor;
+$xslt->registerPHPFunctions();
+$xslt->cloneDocument = false;
+$xslt->importStylesheet($xsl);
+echo $xslt->transformToXml($xml);
+
+?>
+--EXPECT--
+<?xml version="1.0"?>
+hello
+<?xml version="1.0"?>
+bye

ext/xsl/tests/xinclude/data.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0"?>
+<data>
+    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="xincluded.xml" parse="xml"/>
+</data>

ext/xsl/tests/xinclude/xinclude.phpt

@@ -0,0 +1,41 @@
+--TEST--
+doXInclude
+--EXTENSIONS--
+xsl
+dom
+--FILE--
+<?php
+
+chdir(__DIR__);
+
+$xml = new DOMDocument;
+$xml->loadXML('<?xml version="1.0"?><root/>');
+
+$xsl = new DOMDocument;
+$xsl->loadXML(<<<XML
+<?xml version="1.0"?>
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
+    <xsl:template match="/root">
+        <container>
+            <xsl:value-of select="document('data.xml')/data/content"/>
+        </container>
+    </xsl:template>
+</xsl:stylesheet>
+XML);
+
+$xslt = new XSLTProcessor;
+$xslt->doXInclude = true;
+$xslt->importStylesheet($xsl);
+echo $xslt->transformToXml($xml);
+
+$xslt = new XSLTProcessor;
+$xslt->doXInclude = false;
+$xslt->importStylesheet($xsl);
+echo $xslt->transformToXml($xml);
+
+?>
+--EXPECT--
+<?xml version="1.0"?>
+<container>This is sample content</container>
+<?xml version="1.0"?>
+<container/>

ext/xsl/tests/xinclude/xincluded.xml

@@ -0,0 +1,2 @@
+<?xml version="1.0"?>
+<content>This is sample content</content>

ext/xsl/xsltprocessor.c

@@ -313,11 +313,8 @@ PHP_METHOD(XSLTProcessor, importStylesheet)
 	intern = Z_XSL_P(id);
 
 	member = ZSTR_INIT_LITERAL("cloneDocument", 0);
-	cloneDocu = zend_std_read_property(Z_OBJ_P(id), member, BP_VAR_IS, NULL, &rv);
-	if (Z_TYPE_P(cloneDocu) != IS_NULL) {
-		convert_to_long(cloneDocu);
-		clone_docu = Z_LVAL_P(cloneDocu);
-	}
+	cloneDocu = zend_std_read_property(Z_OBJ_P(id), member, BP_VAR_R, NULL, &rv);
+	clone_docu = zend_is_true(cloneDocu);
 	zend_string_release_ex(member, 0);
 	if (clone_docu == 0) {
 		/* check if the stylesheet is using xsl:key, if yes, we have to clone the document _always_ before a transformation */
@@ -415,11 +412,8 @@ static xmlDocPtr php_xsl_apply_stylesheet(zval *id, xsl_object *intern, xsltStyl
 	}
 
 	member = ZSTR_INIT_LITERAL("doXInclude", 0);
-	doXInclude = zend_std_read_property(Z_OBJ_P(id), member, BP_VAR_IS, NULL, &rv);
-	if (Z_TYPE_P(doXInclude) != IS_NULL) {
-		convert_to_long(doXInclude);
-		ctxt->xinclude = Z_LVAL_P(doXInclude);
-	}
+	doXInclude = zend_std_read_property(Z_OBJ_P(id), member, BP_VAR_R, NULL, &rv);
+	ctxt->xinclude = zend_is_true(doXInclude);
 	zend_string_release_ex(member, 0);
 
 	secPrefsValue = intern->securityPrefs;