[php-src] Issue #20202: [PHP 8.3] Wrong IPv6 Class detection for FILTER_FLAG_NO_RES_RANGE

Issue: https://github.com/php/php-src/issues/20202 Author: Ostico ### Description The following code: ```php <?php // This is an ip in the reserved range 2001:db8::/32 - IPv6 prefix for documentation purpose $str = '2001:db8::ff00:42:8329'; $isReserved = filter_var($str, FILTER_VALIDATE_IP, FILTER_FLAG_NO_RES_RANGE) === false; print_r( 'Is reserved: ' . var_export( $isReserved, true ) ); ``` Resulted in this output: ``` // PHP 8.3 Is reserved: false <-- WRONG // PHP < 8.3 Is reserved: true <-- correct ``` But I expected this output instead: ``` // PHP 8.3 Is reserved: true <-- correct // PHP < 8.3 Is reserved: true <-- correct ``` ### PHP Version ```plain PHP 8.3.26 (cli) (built: Oct 1 2025 20:35:14) (NTS) Copyright (c) The PHP Group Zend Engine v4.3.26, Copyright (c) Zend Technologies with Zend OPcache v8.3.26, Copyright (c), by Zend Technologies with Xdebug v3.4.5, Copyright (c) 2002-2025, by Derick Rethans ------------------- PHP 8.2.29 (cli) (built: Jul 3 2025 13:08:18) (NTS) Copyright (c) The PHP Group Zend Engine v4.2.29, Copyright (c) Zend Technologies with Zend OPcache v8.2.29, Copyright (c), by Zend Technologies with Xdebug v3.4.5, Copyright (c) 2002-2025, by Derick Rethans ------------------- PHP 8.1.33 (cli) (built: Jul 3 2025 16:16:18) (NTS) Copyright (c) The PHP Group Zend Engine v4.1.33, Copyright (c) Zend Technologies with Zend OPcache v8.1.33, Copyright (c), by Zend Technologies with Xdebug v3.4.5, Copyright (c) 2002-2025, by Derick Rethans ``` ### Operating System Ubuntu 24.04.3 LTS