Bug #74017 [Com]: gmp_export() gives wrong result

From: Date: Tue, 31 Oct 2023 22:08:21 +0000
Subject: Bug #74017 [Com]: gmp_export() gives wrong result
References: 1  Groups: php.bugs 
Request: Send a blank email to php-bugs+get-245707@lists.php.net to get a copy of this message 
Edit report at https://bugs.php.net/bug.php?id=74017&edit=1

 ID:                 74017
 Comment by:         aub2000 at rambler dot ru
 Reported by:        zhuravlov dot ip at ya dot ru
 Summary:            gmp_export() gives wrong result
 Status:             Not a bug
 Type:               Bug
 Package:            GNU MP related
 Operating System:   Linux x86_64
 PHP Version:        7.0.15
 Block user comment: N
 Private report:     N

 New Comment:

Если это не ошибка а
особенность реализации, то
добавьте ваше текст в
описание функции в php.net/manual
Я потратил много времени
чтобы найти причину такого
поведения функции.


Previous Comments:
------------------------------------------------------------------------
[2017-01-30 17:26:49] nikic@php.net

The result is intentional. 0 returns "" instead of "\x00" in the same way that
255 returns "\xff" and not "\x00\xff". Additionally, returning an empty string
is consistent with the behavior of mpz_export(), which is spec'd to yield a zero count for a
zero op.

------------------------------------------------------------------------
[2017-01-30 16:46:19] zhuravlov dot ip at ya dot ru

Description:
------------
Distro: openSUSE Leap 42.1 (x86_64)

Packages used:
  php7-7.0.15-35.2.x86_64
  php7-gmp-7.0.15-35.2.x86_64

Standard (not changed) php.ini

Description:
The function gmp_export() gives wrong result for certain input: if the argument supplied is 0 or
gmp_init(0) then gmp_export() outputs empty string.

Test script:
---------------
<?php
echo gmp_export(         0 );  // will output '', must be "\x0"
echo gmp_export(gmp_init(0));  // will output '', must be "\x0"




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Edit this bug report at https://bugs.php.net/bug.php?id=74017&edit=1

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