Bug #75431 [Opn->Nab]: False negative filtering a string with short IPv4

Edit report at https://bugs.php.net/bug.php?id=75431&edit=1 ID: 75431 Updated by: kalle@php.net Reported by: skv at eml dot ru Summary: False negative filtering a string with short IPv4 -Status: Open +Status: Not a bug Type: Bug Package: Filter related Operating System: linux (debian/ubuntu) PHP Version: Irrelevant Block user comment: N Private report: N New Comment: The ext/filter extension conforms RFC791 which does not specify any short notation. You may want to consider using the inet_*() family functions for non standardized conversions. Thanks! Previous Comments: ------------------------------------------------------------------------ [2017-10-24 17:50:42] skv at eml dot ru Description: ------------ --- From manual page: http://www.php.net/filter.filters.validate --- The FILTER_VALIDATE_IP ignores short notations of IPv4 address (e.g. "127.1") and falsely reports them to not be valid IP Addresses. It somehow manages to recognize short forms of IPv6 addresses though (e.g. "::1"). Btw, simple telnet manages to recognize 'em: $ telnet 127.1 22 Trying 127.0.0.1... Connected to 127.1. Escape character is '^]'. SSH-2.0-OpenSSH_7.2p2 Ubuntu-4ubuntu2.2 Test script: --------------- #!/bin/bash php -r 'var_dump( filter_var("127.1", FILTER_VALIDATE_IP) );' Expected result: ---------------- string(5) "127.1" Actual result: -------------- bool(false) ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=75431&edit=1