Promoted property with default value is not considered to have default value using reflection

[paulbalandan]

Description

The following code:

<?php

class Foo
{
    public function __construct(
        public ?array $meta = null,
    ) {}
}

class Bar
{
    public ?array $meta = null;
    
    public function __construct(?array $meta = null)
    {
        $this->meta = $meta;
    }
}

$foo = new ReflectionClass(new Foo);
$bar = new ReflectionClass(new Bar);
var_dump($foo->getProperty('meta')->hasDefaultValue());
var_dump($bar->getProperty('meta')->hasDefaultValue());

Resulted in this output:

bool(false)
bool(true)

But I expected this output instead:

bool(true)
bool(true)

See https://3v4l.org/7Bndi

PHP Version

PHP 8.4.11 (cli) (built: Jul 29 2025 15:30:21) (NTS)
Copyright (c) The PHP Group
Built by Homebrew
Zend Engine v4.4.11, Copyright (c) Zend Technologies
    with Xdebug v3.4.5, Copyright (c) 2002-2025, by Derick Rethans
    with Zend OPcache v8.4.11, Copyright (c), by Zend Technologies

Operating System

MacOS

[nielsdos]

This pops up every once in a while.
That's because the default value applies to the parameter, not the property. So the result is right.