bug #37763 Fix deprecated libxml_disable_entity_loader (jderusse)

This PR was merged into the 3.4 branch.

Discussion
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Fix deprecated libxml_disable_entity_loader

| Q             | A
| ------------- | ---
| Branch?       | 3.4
| Bug fix?      | yes
| New feature?  | no
| Deprecations? | no
| Tickets       | /
| License       | MIT
| Doc PR        | /

Fix deprecation `Function libxml_disable_entity_loader() is deprecated` triggered by php/php-src#5867 in PHP8

Commits
-------

1f19da3936 Fix deprecated libxml_disable_entity_loader

Author: fabpot

Tests/Util/XmlUtilsTest.php

@@ -199,7 +199,9 @@ public function testLoadEmptyXmlFile()
     // test for issue https://github.com/symfony/symfony/issues/9731
     public function testLoadWrongEmptyXMLWithErrorHandler()
     {
-        $originalDisableEntities = libxml_disable_entity_loader(false);
+        if (LIBXML_VERSION < 20900) {
+            $originalDisableEntities = libxml_disable_entity_loader(false);
+        }
         $errorReporting = error_reporting(-1);
 
         set_error_handler(function ($errno, $errstr) {
@@ -219,12 +221,13 @@ public function testLoadWrongEmptyXMLWithErrorHandler()
             error_reporting($errorReporting);
         }
 
-        $disableEntities = libxml_disable_entity_loader(true);
-        libxml_disable_entity_loader($disableEntities);
-
-        libxml_disable_entity_loader($originalDisableEntities);
+        if (LIBXML_VERSION < 20900) {
+            $disableEntities = libxml_disable_entity_loader(true);
+            libxml_disable_entity_loader($disableEntities);
 
-        $this->assertFalse($disableEntities);
+            libxml_disable_entity_loader($originalDisableEntities);
+            $this->assertFalse($disableEntities);
+        }
 
         // should not throw an exception
         XmlUtils::loadFile(__DIR__.'/../Fixtures/Util/valid.xml', __DIR__.'/../Fixtures/Util/schema.xsd');

Util/XmlUtils.php

@@ -51,21 +51,27 @@ public static function parse($content, $schemaOrCallable = null)
         }
 
         $internalErrors = libxml_use_internal_errors(true);
-        $disableEntities = libxml_disable_entity_loader(true);
+        if (LIBXML_VERSION < 20900) {
+            $disableEntities = libxml_disable_entity_loader(true);
+        }
         libxml_clear_errors();
 
         $dom = new \DOMDocument();
         $dom->validateOnParse = true;
         if (!$dom->loadXML($content, LIBXML_NONET | (\defined('LIBXML_COMPACT') ? LIBXML_COMPACT : 0))) {
-            libxml_disable_entity_loader($disableEntities);
+            if (LIBXML_VERSION < 20900) {
+                libxml_disable_entity_loader($disableEntities);
+            }
 
             throw new XmlParsingException(implode("\n", static::getXmlErrors($internalErrors)));
         }
 
         $dom->normalizeDocument();
 
         libxml_use_internal_errors($internalErrors);
-        libxml_disable_entity_loader($disableEntities);
+        if (LIBXML_VERSION < 20900) {
+            libxml_disable_entity_loader($disableEntities);
+        }
 
         foreach ($dom->childNodes as $child) {
             if (XML_DOCUMENT_TYPE_NODE === $child->nodeType) {