ReflectionClass can't detect readonly properties for mysqli

Description

The following code:

<?php
$reflection = new ReflectionClass(mysqli::class);
$props = [];
foreach ($reflection->getProperties() as $property) {
    $props[] = $property->getName() . ' | readonly: ' . (int) $property->isReadOnly();
}
print_r($props);

Resulted in this output:

Array
(
    [0] => affected_rows | readonly: 0
    [1] => client_info | readonly: 0
    [2] => client_version | readonly: 0
    [3] => connect_errno | readonly: 0
    [4] => connect_error | readonly: 0
    [5] => errno | readonly: 0
    [6] => error | readonly: 0
    [7] => error_list | readonly: 0
    [8] => field_count | readonly: 0
    [9] => host_info | readonly: 0
    [10] => info | readonly: 0
    [11] => insert_id | readonly: 0
    [12] => server_info | readonly: 0
    [13] => server_version | readonly: 0
    [14] => sqlstate | readonly: 0
    [15] => protocol_version | readonly: 0
    [16] => thread_id | readonly: 0
    [17] => warning_count | readonly: 0
)

But I expected this output instead:

Array
(
    [0] => affected_rows | readonly: 1
    [1] => client_info | readonly: 1
    [2] => client_version | readonly: 1
    [3] => connect_errno | readonly: 1
    [4] => connect_error | readonly: 1
    [5] => errno | readonly: 1
    [6] => error | readonly: 1
    [7] => error_list | readonly: 1
    [8] => field_count | readonly: 1
    [9] => host_info | readonly: 1
    [10] => info | readonly: 1
    [11] => insert_id | readonly: 1
    [12] => server_info | readonly: 1
    [13] => server_version | readonly: 1
    [14] => sqlstate | readonly: 1
    [15] => protocol_version | readonly: 1
    [16] => thread_id | readonly: 1
    [17] => warning_count | readonly: 1
)

PHP Version

PHP 8.3.8

Operating System

No response

Bắt đầu bằng cách tái hiện ví dụ ReflectionClass và mysqli::class trong báo cáo trên PHP 8.3.8, sau đó lần theo cách các thuộc tính của mysqli được cung cấp cho reflection. Hoàn tất khi các thuộc tính được liệt kê báo cáo readonly: 1, kèm theo độ bao phủ hồi quy cho hành vi này.