SQLite: PDOException: open_basedir prohibits opening :memory:?cache=shared

Description

The following code:

#!/usr/bin/env php
<?php

print "open_basedir: ";
var_dump(ini_get("open_basedir"));
print "\n";

$db = new \PDO("sqlite::memory:?cache=shared", null, null, [
    \PDO::ATTR_PERSISTENT => true,
    \PDO::ATTR_ERRMODE => \PDO::ERRMODE_EXCEPTION,
    \PDO::ATTR_EMULATE_PREPARES => false,
    \PDO::ATTR_DEFAULT_FETCH_MODE => \PDO::FETCH_ASSOC,
]);

Resulted in this output:

$ ./sqlite-nomemory.php
open_basedir: string(0) ""

PHP Fatal error:  Uncaught PDOException: open_basedir prohibits opening :memory:?cache=shared in …\sqlite-nomemory.php:8
Stack trace:
#0 …\sqlite-nomemory.php(8): PDO->__construct('sqlite::memo
ry:...', NULL, Object(SensitiveParameterValue), Array)
#1 {main}
  thrown in …\sqlite-nomemory.php on line 8

But I expected this output instead:

I expected no error. Frankly, the code should just work.

PHP Version

PHP 8.4.13 (cli) (built: Sep 23 2025 15:17:09) (ZTS Visual C++ 2022 x64)
Copyright (c) The PHP Group
Zend Engine v4.4.13, Copyright (c) Zend Technologies
    with Zend OPcache v8.4.13, Copyright (c), by Zend Technologies

Operating System

Windows 10

Start by running the sqlite-nomemory.php reproduction on Windows 10 with PHP 8.4.13 and inspect the PDO SQLite handling reached by the PDO constructor. Done means the shown sqlite::memory:?cache=shared connection succeeds without the open_basedir exception; an open pull request is already linked.