Declare XML_SAX_IMPL constant in stubs (php#9732)

Author: kocsismate

ext/xml/php_xml.h

@@ -46,4 +46,10 @@ enum php_xml_option {
 	PHP_XML_OPTION_SKIP_WHITE
 };
 
+#ifdef LIBXML_EXPAT_COMPAT
+#define PHP_XML_SAX_IMPL "libxml"
+#else
+#define PHP_XML_SAX_IMPL "expat"
+#endif
+
 #endif /* PHP_XML_H */

ext/xml/xml.c

@@ -264,12 +264,6 @@ PHP_MINIT_FUNCTION(xml)
 	php_xml_mem_hdlrs.realloc_fcn = php_xml_realloc_wrapper;
 	php_xml_mem_hdlrs.free_fcn = php_xml_free_wrapper;
 
-#ifdef LIBXML_EXPAT_COMPAT
-	REGISTER_STRING_CONSTANT("XML_SAX_IMPL", "libxml", CONST_CS|CONST_PERSISTENT);
-#else
-	REGISTER_STRING_CONSTANT("XML_SAX_IMPL", "expat", CONST_CS|CONST_PERSISTENT);
-#endif
-
 	return SUCCESS;
 }
 

ext/xml/xml.stub.php

@@ -134,6 +134,12 @@
  */
 const XML_OPTION_SKIP_WHITE = UNKNOWN;
 
+/**
+ * @var string
+ * @cvalue PHP_XML_SAX_IMPL
+ */
+const XML_SAX_IMPL = UNKNOWN;
+
 function xml_parser_create(?string $encoding = null): XMLParser {}
 
 function xml_parser_create_ns(?string $encoding = null, string $separator = ":"): XMLParser {}