From 561f1afe6ec3e1c551dba657a77ad948065c5e95 Mon Sep 17 00:00:00 2001
From: Anatol Belski <ab@php.net>
Date: Sat, 6 May 2017 15:06:34 +0200
Subject: [PATCH] Fixed bug #74547 mysqli::change_user() doesn't accept null as
 $database argument w/strict_types

---
 ext/mysqli/mysqli_api.c        |  2 +-
 ext/mysqli/tests/bug74547.phpt | 25 +++++++++++++++++++++++++
 2 files changed, 26 insertions(+), 1 deletion(-)
 create mode 100644 ext/mysqli/tests/bug74547.phpt

diff --git a/ext/mysqli/mysqli_api.c b/ext/mysqli/mysqli_api.c
index 244ed945dee..ffdcdaf140a 100644
--- a/ext/mysqli/mysqli_api.c
+++ b/ext/mysqli/mysqli_api.c
@@ -619,7 +619,7 @@ PHP_FUNCTION(mysqli_change_user)
 	const		CHARSET_INFO * old_charset;
 #endif
 
-	if (zend_parse_method_parameters(ZEND_NUM_ARGS(), getThis(), "Osss", &mysql_link, mysqli_link_class_entry, &user, &user_len, &password, &password_len, &dbname, &dbname_len) == FAILURE) {
+	if (zend_parse_method_parameters(ZEND_NUM_ARGS(), getThis(), "Osss!", &mysql_link, mysqli_link_class_entry, &user, &user_len, &password, &password_len, &dbname, &dbname_len) == FAILURE) {
 		return;
 	}
 	MYSQLI_FETCH_RESOURCE_CONN(mysql, mysql_link, MYSQLI_STATUS_VALID);
diff --git a/ext/mysqli/tests/bug74547.phpt b/ext/mysqli/tests/bug74547.phpt
new file mode 100644
index 00000000000..a771c9a8524
--- /dev/null
+++ b/ext/mysqli/tests/bug74547.phpt
@@ -0,0 +1,25 @@
+--TEST--
+Bug #74547 mysqli::change_user() doesn't accept null as $database argument w/strict_types
+--SKIPIF--
+<?php
+  require_once('skipif.inc');
+  require_once('skipifconnectfailure.inc');
+?>
+--FILE--
+<?php
+	declare(strict_types=1);
+
+	require_once("connect.inc");
+
+	if (!$link = my_mysqli_connect($host, $user, $passwd, $db, $port, $socket))
+		printf("[001] Cannot connect to the server using host=%s, user=%s, passwd=***, dbname=%s, port=%s, socket=%s\n",
+			$host, $user, $db, $port, $socket);
+
+	var_dump(mysqli_change_user($link, $user, $passwd, NULL));
+
+	mysqli_close($link);
+?>
+===DONE===
+--EXPECTF--
+bool(true)
+===DONE===