Fix #63486

Author: Julien Pauli

ext/mysqli/php_mysqli_structs.h

@@ -313,6 +313,7 @@ extern PHPAPI zend_class_entry *spl_ce_RuntimeException;
 	mysqli_object *intern = (mysqli_object *)zend_object_store_get_object(*(__id) TSRMLS_CC);\
 	efree(intern->ptr); \
 	intern->ptr = NULL; \
+	ZVAL_NULL(*__id); \
 }
 
 

ext/mysqli/tests/bug63486.phpt

@@ -0,0 +1,55 @@
+--TEST--
+mysqli_free_resource() - resets the zval to NULL
+--SKIPIF--
+<?php
+	require_once('skipif.inc');
+	require_once('skipifemb.inc');
+	require_once('skipifconnectfailure.inc');
+?>
+--FILE--
+<?php
+	require('connect.inc');
+	if (!$link = my_mysqli_connect($host, $user, $passwd, $db, $port, $socket)) {
+		printf("[001] [%d] %s\n", mysqli_connect_errno(), mysqli_connect_error());
+		die();
+	}
+
+	if (!($res = mysqli_query($link, "SELECT 1"))) {
+		printf("[002] [%d] %s\n", mysqli_errno($link), mysqli_error($link));
+		die();
+	}
+
+	$row = mysqli_fetch_row($res);
+	var_dump($row);
+	var_dump($res);
+	
+	mysqli_free_result($res);
+	
+	var_dump($row);
+	var_dump($res);
+?>
+--EXPECTF--
+array(1) {
+  [0]=>
+  string(1) "1"
+}
+object(mysqli_result)#3 (5) {
+  ["current_field"]=>
+  int(0)
+  ["field_count"]=>
+  int(1)
+  ["lengths"]=>
+  array(1) {
+    [0]=>
+    int(1)
+  }
+  ["num_rows"]=>
+  int(1)
+  ["type"]=>
+  int(0)
+}
+array(1) {
+  [0]=>
+  string(1) "1"
+}
+NULL