Description:
------------
<?php
  
class StreamDir
{
    public $context = NULL;
 
    public function dir_opendir(string $path, int $options)
    {
        return false;
    }
}
$wrapper_list = stream_get_wrappers();

if(in_array('diy', $wrapper_list))
{

    echo "stream wrapper already\n";

    exit(0);
}

stream_wrapper_register("dir", "StreamDir");

$context = stream_context_create(['dir' => []]);

$dir = opendir('dir://Directory path', $context);

var_dump($dir);

Test script:
---------------
<?php
  
class StreamDir
{
    public $context = NULL;
 
    public function dir_opendir(string $path, int $options)
    {
        return false;
    }
}
$wrapper_list = stream_get_wrappers();

if(in_array('diy_wrapper', $wrapper_list))
{

    echo "stream wrapper already\n";

    exit(0);
}

stream_wrapper_register("dir_wrapper", "StreamDir");

$context = stream_context_create(['dir_wrapper' => []]);

$dir = opendir('dir_wrapper://Directory path', $context);

var_dump($dir);


Expected result:
----------------
tips open directory failed

Actual result:
--------------
Warning: stream_wrapper_register(): Invalid protocol scheme specified. Unable to register wrapper class StreamDir to dir_wrapper:// in PHP run script path