Bug #75018 [Opn->Csd]: Data corruption when reading fields of bit type
Edit report at https://bugs.php.net/bug.php?id=75018&edit=1
ID: 75018
Updated by: ab@php.net
Reported by: ale5000 at gmail dot com
Summary: Data corruption when reading fields of bit type
-Status: Open
+Status: Closed
Type: Bug
Package: MySQLi related
Operating System: Windows 7 64-bit
PHP Version: 7.1.7
Block user comment: N
Private report: N
New Comment:
Automatic comment on behalf of ab
Revision: http://git.php.net/?p=php-src.git;a=commit;h=3d93856c4a05394196c5610ae11cf019d1e18f76
Log: Fixed bug #75018, fixed bug #75177
Previous Comments:
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[2017-09-13 11:06:19] ab@php.net
Related To: Bug #75177
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[2017-08-01 15:07:53] michal at cihar dot com
I've just tested this and here is what I've found out:
- I can reproduce this when running 32-bit PHP on 64-bit Windows, it does not happen in 64-bit
builds
- The returned value seems to be random, depending on executed code or MySQL statements
- I can reproduce this behavior on PHP 7.1.7 and 7.2.0beta1
Results I got: 0x1508618400000000 0x100000000 0x10c6632400000000 (though this most likely
doesn't mean anything)
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[2017-08-01 14:19:29] ale5000 at gmail dot com
Description:
------------
It corrupt data when reading fields of bit type.
See the sample code.
The problem is possibly Windows specific but I'm not sure.
Test script:
---------------
<?php
$username = 'root';
$password = '';
$database_name = 'test_db';
$mysqli = new mysqli('127.0.0.1', $username, $password, $database_name);
if($mysqli->connect_errno) die('Error');
$sql = "CREATE TABLE test (bit_column_1 bit(1) NOT NULL) DEFAULT CHARSET=utf8";
$mysqli->query($sql);
$sql = "INSERT INTO test (bit_column_1) VALUES (0)";
$mysqli->query($sql);
$sql = "SELECT bit_column_1 FROM test";
if(!$result = $mysqli->query($sql)) die('Failed');
$row = $result->fetch_assoc();
echo "Result: ".$row['bit_column_1'];
Expected result:
----------------
0
Actual result:
--------------
668556962937438208
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Edit this bug report at https://bugs.php.net/bug.php?id=75018&edit=1
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