Add declared properties to LibXMLError

Partially addresses bug #79804.

Author: nikic

ext/libxml/libxml.c

@@ -790,6 +790,33 @@ static PHP_MINIT_FUNCTION(libxml)
 	INIT_CLASS_ENTRY(ce, "LibXMLError", NULL);
 	libxmlerror_class_entry = zend_register_internal_class(&ce);
 
+	zval default_val;
+	zend_string *name;
+	ZVAL_UNDEF(&default_val);
+
+	name = zend_string_init("level", sizeof("level")-1, 1);
+	zend_declare_typed_property(
+		libxmlerror_class_entry, name, &default_val, ZEND_ACC_PUBLIC, NULL,
+		(zend_type) ZEND_TYPE_INIT_MASK(MAY_BE_LONG));
+	zend_string_release(name);
+	zend_declare_typed_property(
+		libxmlerror_class_entry, ZSTR_KNOWN(ZEND_STR_CODE), &default_val, ZEND_ACC_PUBLIC, NULL,
+		(zend_type) ZEND_TYPE_INIT_MASK(MAY_BE_LONG));
+	name = zend_string_init("column", sizeof("column")-1, 1);
+	zend_declare_typed_property(
+		libxmlerror_class_entry, name, &default_val, ZEND_ACC_PUBLIC, NULL,
+		(zend_type) ZEND_TYPE_INIT_MASK(MAY_BE_LONG));
+	zend_string_release(name);
+	zend_declare_typed_property(
+		libxmlerror_class_entry, ZSTR_KNOWN(ZEND_STR_MESSAGE), &default_val, ZEND_ACC_PUBLIC, NULL,
+		(zend_type) ZEND_TYPE_INIT_MASK(MAY_BE_STRING));
+	zend_declare_typed_property(
+		libxmlerror_class_entry, ZSTR_KNOWN(ZEND_STR_FILE), &default_val, ZEND_ACC_PUBLIC, NULL,
+		(zend_type) ZEND_TYPE_INIT_MASK(MAY_BE_STRING));
+	zend_declare_typed_property(
+		libxmlerror_class_entry, ZSTR_KNOWN(ZEND_STR_LINE), &default_val, ZEND_ACC_PUBLIC, NULL,
+		(zend_type) ZEND_TYPE_INIT_MASK(MAY_BE_LONG));
+
 	if (sapi_module.name) {
 		static const char * const supported_sapis[] = {
 			"cgi-fcgi",