Merge branch 'PHP-8.4'

* PHP-8.4:
  Fix GH-17145: DOM memory leak

Author: nielsdos

ext/dom/php_dom.c

@@ -2371,7 +2371,7 @@ void php_dom_get_content_into_zval(const xmlNode *nodep, zval *return_value, boo
 		case XML_ATTRIBUTE_NODE: {
 			bool free;
 			xmlChar *value = php_libxml_attr_value((const xmlAttr *) nodep, &free);
-			RETURN_STRING_FAST((const char *) value);
+			RETVAL_STRING_FAST((const char *) value);
 			if (free) {
 				xmlFree(value);
 			}

ext/dom/tests/gh17145.phpt

@@ -0,0 +1,22 @@
+--TEST--
+GH-17145 (DOM memory leak)
+--EXTENSIONS--
+dom
+--CREDITS--
+YuanchengJiang
+--SKIPIF--
+<?php
+if (LIBXML_VERSION < 21300) die("skip Upstream libxml bug causes incorrect output, fixed in GNOME/libxml2@b8597f4");
+?>
+--FILE--
+<?php
+$element = new DOMElement("N", "W", "y");
+$attr = new DOMAttr("c" , "n");
+$doc = new DOMDocument();
+$doc->appendChild($element);
+$element->setAttributeNodeNS($attr);
+$attr->appendChild($doc->createEntityReference('amp'));
+echo $attr->value;
+?>
+--EXPECT--
+n&