Add regression test for not setting optional closures again

Author: Girgias

ext/session/tests/user_session_module/session_set_save_handler_multiple.phpt

@@ -0,0 +1,90 @@
+--TEST--
+session_set_save_handler(): optional closures not set again in second call
+--INI--
+session.use_strict_mode=1
+session.name=PHPSESSID
+session.serialize_handler=php_serialize
+--EXTENSIONS--
+session
+--FILE--
+<?php
+
+$data = [];
+
+ob_start();
+function open($path, $name): bool {
+    echo 'Open', "\n";
+    return true;
+}
+function create_sid(): string {
+    echo 'Create SID OLD', "\n";
+    return 'OLD_ID';
+}
+function read($key): string|false {
+    echo 'Read', "\n";
+    global $data;
+    return serialize($data);
+}
+function write($key, $val): bool {
+    echo 'Write', "\n";
+    global $data;
+    $data[$key] = $val;
+    return true;
+}
+function close(): bool {
+    echo 'Close', "\n";
+    return true;
+}
+function destroy($id): bool {
+    echo 'Destroy', "\n";
+    return true;
+}
+function gc($lifetime): bool {
+    return true;
+}
+function createSid(): string {
+    echo 'Create SID NEW', "\n";
+    return 'NEW_ID';
+}
+function validateId($key): bool {
+    echo 'Validate ID', "\n";
+    return true;
+}
+function updateTimestamp($key, $data): bool {
+    echo 'Update Timestamp', "\n";
+    return true;
+}
+
+session_set_save_handler('open', 'close', 'read', 'write', 'destroy', 'gc', 'create_sid', 'validateId', 'updateTimestamp');
+session_start();
+
+$_SESSION['foo'] = "hello";
+
+session_write_close();
+session_unset();
+
+echo "New handlers:\n";
+session_set_save_handler("open", "close", "read", "write", "destroy", "gc");
+session_start();
+var_dump($_SESSION);
+$_SESSION['bar'] = "world";
+session_write_close();
+
+ob_end_flush();
+?>
+--EXPECT--
+Open
+Create SID OLD
+Read
+Write
+Close
+New handlers:
+Open
+Validate ID
+Read
+array(1) {
+  ["OLD_ID"]=>
+  string(28) "a:1:{s:3:"foo";s:5:"hello";}"
+}
+Write
+Close