Integer overflow on 32bit PHP caused by GH-20601

[tml]

Description

The following code:

<?php
ftp_connect("localhost", 21, 90);

Resulted in this output:

Fatal error: Uncaught ValueError: ftp_connect(): Argument #3 ($timeout) must be less than -2147483648 in...

This problem is not reproducible on 64-bt PHP.

PHP Version

php -v
PHP 8.4.16 (cli) (built: Dec 23 2025 02:03:22) (ZTS)
Copyright (c) The PHP Group
Zend Engine v4.4.16, Copyright (c) Zend Technologies
    with Zend OPcache v8.4.16, Copyright (c), by Zend Technologies

uname:
Linux gatto.corradoroberto.it 6.1.144-server.corradoroberto.it #1 SMP PREEMPT_DYNAMIC Sat Jul 12 10:14:46 CEST 2025 i686 Intel(R) Core(TM) i5-9500 CPU @ 3.00GHz GenuineIntel GNU/Linux

Operating System

Any 32-bit Linux

[devnexen]

If I recall, a fix about this will be present for 8.4.17

[iluuu1994]

As noted by @devnexen, the fix should be available in 8.4.17. Some thing did go wrong (see GH-20603), we'll discuss how to avoid that in the future.