From:             pcdinh at gmail dot com
Operating system: Windows XP SP3
PHP version:      5.2.7RC2
PHP Bug Type:     MySQLi related
Bug description:  mysqli_multi_query with buggy queries closes MySQL connection

Description:
------------
Make a multiple queries that contains a buggy DML SQL command with
mysqli_multi_query can cause MySQL connection closed: mysqli_ping returns
false right after mysqli_multi_query() invocation.

Apache 2.2.6
MySQL 5.0.67



Reproduce code:
---------------
<?php
ini_set('mysqli.reconnect', 'Off');
$mysqli = mysqli_init();
mysqli_real_connect($mysqli, "localhost", "root", "123456", "test");

/* check connection */
if (mysqli_connect_errno()) {
    printf("Connect failed: %s\n", mysqli_connect_error());
    exit();
}

/*

CREATE TABLE `test2` (
  `id` int(11) DEFAULT NULL,
  `username` varchar(100) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

Buggy DML SQL command: INSERT INTO test2 VALUES (1008-, 'pcdinh5')
*/

$query = "INSERT INTO test2 VALUES (1007, 'pcdinh4');INSERT INTO test2
VALUES (1008-, 'pcdinh5');";

/* execute multi query */
mysqli_multi_query($mysqli, $query);

if (false === mysqli_ping($mysqli))
{
    exit('Database connection is closed');
}

?>

Expected result:
----------------
Nothing happens. If this script produces a message: Database connection is
closed means there is a problem

Actual result:
--------------
This script produces a message: Database connection is closed

-- 
Edit bug report at http://bugs.php.net/?id=46448&edit=1
-- 
Try a CVS snapshot (PHP 5.2):        
http://bugs.php.net/fix.php?id=46448&r=trysnapshot52
Try a CVS snapshot (PHP 5.3):        
http://bugs.php.net/fix.php?id=46448&r=trysnapshot53
Try a CVS snapshot (PHP 6.0):        
http://bugs.php.net/fix.php?id=46448&r=trysnapshot60
Fixed in CVS:                        
http://bugs.php.net/fix.php?id=46448&r=fixedcvs
Fixed in CVS and need be documented: 
http://bugs.php.net/fix.php?id=46448&r=needdocs
Fixed in release:                    
http://bugs.php.net/fix.php?id=46448&r=alreadyfixed
Need backtrace:                      
http://bugs.php.net/fix.php?id=46448&r=needtrace
Need Reproduce Script:               
http://bugs.php.net/fix.php?id=46448&r=needscript
Try newer version:                   
http://bugs.php.net/fix.php?id=46448&r=oldversion
Not developer issue:                 
http://bugs.php.net/fix.php?id=46448&r=support
Expected behavior:                   
http://bugs.php.net/fix.php?id=46448&r=notwrong
Not enough info:                     
http://bugs.php.net/fix.php?id=46448&r=notenoughinfo
Submitted twice:                     
http://bugs.php.net/fix.php?id=46448&r=submittedtwice
register_globals:                    
http://bugs.php.net/fix.php?id=46448&r=globals
PHP 4 support discontinued:          http://bugs.php.net/fix.php?id=46448&r=php4
Daylight Savings:                    http://bugs.php.net/fix.php?id=46448&r=dst
IIS Stability:                       
http://bugs.php.net/fix.php?id=46448&r=isapi
Install GNU Sed:                     
http://bugs.php.net/fix.php?id=46448&r=gnused
Floating point limitations:          
http://bugs.php.net/fix.php?id=46448&r=float
No Zend Extensions:                  
http://bugs.php.net/fix.php?id=46448&r=nozend
MySQL Configuration Error:           
http://bugs.php.net/fix.php?id=46448&r=mysqlcfg

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