From:
Operating system:
PHP version: 5.3.6
Package: GNU MP related
Bug Type: Bug
Bug description:Leading 0s sometimes breaks GMP conversions
Description:
------------
gmp_init() accepts a numeric string and an optional base paramater. The
string can
use PHP's standard notation for bases - leading 0 or octal, leading 0x for
hex,
but this can be overridden by the base parameter.
To an extent it does this, but if the input value matches one of those
patterns,
but is not valid in octal or hex, the conversion fails.
It's not quite that simple, as a string that looks like invalid octal is
successfully handled as hex, though it doesn't work in other bases.
I think this is a bug - if the base parameter is supplied, it should take
complete
precedence over the string format, no matter what it is. I think this is a
PHP
issue rather than a gmp library issue, since it's affected by PHP's numeric
conventions that gmp doesn't share.
It's possible to work around this by trimming leading zeros from the input
values,
however that shouldn't be necessary, and at the very least should be
documented if
it's needed.
Test script:
---------------
echo gmp_strval(gmp_init('010'), 16)."\n"; //Octal
echo gmp_strval(gmp_init('010', 16), 16)."\n"; //Looks like octal, treat as
b16
echo gmp_strval(gmp_init('01f'), 16)."\n"; //Invalid octal
echo gmp_strval(gmp_init('01f', 16), 16)."\n"; //Looks like invalid octal,
treat as b16
echo gmp_strval(gmp_init('10'), 16)."\n"; //Decimal
echo gmp_strval(gmp_init('10', 16), 16)."\n"; //Looks like decimal, treat
as b16
echo gmp_strval(gmp_init('0x10'), 16)."\n"; //Hex
echo gmp_strval(gmp_init('0x10', 16), 16)."\n"; //Looks like hex, is hex
echo gmp_strval(gmp_init('0x1h'), 16)."\n"; //Invalid hex
echo gmp_strval(gmp_init('0x10', 62), 16)."\n"; //Looks like hex, treat as
b62
echo gmp_strval(gmp_init('0x1h', 62), 16)."\n"; //Looks like invalid hex,
treat as b62
echo gmp_strval(gmp_init('x10', 62), 16)."\n"; //Looks like ?, treat as
b62
echo gmp_strval(gmp_init('0Bz', 62), 16)."\n"; //Looks like invalid octal,
treat as b62
echo gmp_strval(gmp_init('Bz', 62), 16)."\n"; //Looks like ?, treat as b62
Expected result:
----------------
8
10
0
1f
a
10
10
10
0
10
3762a
3762a
2e7
2e7
Actual result:
--------------
8
10
0
1f
a
10
10
10
0
10
0
3762a
0
2e7
--
Edit bug report at https://bugs.php.net/bug.php?id=55398&edit=1
--
Try a snapshot (PHP 5.4):
https://bugs.php.net/fix.php?id=55398&r=trysnapshot54
Try a snapshot (PHP 5.3):
https://bugs.php.net/fix.php?id=55398&r=trysnapshot53
Try a snapshot (trunk):
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Fixed in SVN:
https://bugs.php.net/fix.php?id=55398&r=fixed
Fixed in SVN and need be documented:
https://bugs.php.net/fix.php?id=55398&r=needdocs
Fixed in release:
https://bugs.php.net/fix.php?id=55398&r=alreadyfixed
Need backtrace:
https://bugs.php.net/fix.php?id=55398&r=needtrace
Need Reproduce Script:
https://bugs.php.net/fix.php?id=55398&r=needscript
Try newer version:
https://bugs.php.net/fix.php?id=55398&r=oldversion
Not developer issue:
https://bugs.php.net/fix.php?id=55398&r=support
Expected behavior:
https://bugs.php.net/fix.php?id=55398&r=notwrong
Not enough info:
https://bugs.php.net/fix.php?id=55398&r=notenoughinfo
Submitted twice:
https://bugs.php.net/fix.php?id=55398&r=submittedtwice
register_globals:
https://bugs.php.net/fix.php?id=55398&r=globals
PHP 4 support discontinued:
https://bugs.php.net/fix.php?id=55398&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=55398&r=dst
IIS Stability:
https://bugs.php.net/fix.php?id=55398&r=isapi
Install GNU Sed:
https://bugs.php.net/fix.php?id=55398&r=gnused
Floating point limitations:
https://bugs.php.net/fix.php?id=55398&r=float
No Zend Extensions:
https://bugs.php.net/fix.php?id=55398&r=nozend
MySQL Configuration Error:
https://bugs.php.net/fix.php?id=55398&r=mysqlcfg
