`DOCUMENT_ROOT` from environment in cli is not propagated to $_SERVER['DOCUMENT_ROOT']

Description

The following code:

DOCUMENT_ROOT=/test php -r 'var_dump($_SERVER["DOCUMENT_ROOT"]);'

Resulted in this output:

string(0) ""

But I expected this output instead:

string(5) "/test"

with a file the out is the same
I think the culprit is https://github.com/php/php-src/blob/42f994cd05da353c93cd65775026859f664289a3/sapi/cli/php_cli.c#L344 as the only mention of DOCUMENT_ROOT for php-cli

PHP Version

PHP 8.4.15 (cli) (built: Nov 20 2025 19:00:52) (NTS)
Copyright (c) The PHP Group
Built by Debian
Zend Engine v4.4.15, Copyright (c) Zend Technologies
    with Zend OPcache v8.4.15, Copyright (c), by Zend Technologies

Operating System

No response

Inizia in sapi/cli/php_cli.c, nella gestione di DOCUMENT_ROOT identificata nell’issue, e riproduci l’esempio della riga di comando con e senza un file. Traccia come il valore dell’ambiente arriva a $_SERVER; il lavoro è completato quando PHP CLI espone /test come $_SERVER['DOCUMENT_ROOT'] in entrambi i casi.