Description:
------------
PHP 5.3.1 is unable to connect to MYSQL running on same Windows Vista machine when host file contains:

::1         localhost   # IP v6 local host
127.0.0.1   localhost


If "::1" line is commented out, test program works.  This issue also affects phpMyAdmin.  This problem started after upgrading to PHP 5.3.1.

Running "mysql -h localhost" from command line works without issue.

When "::1" is commented out, phpMyAdmin says:

MySQL client version: mysqlnd 5.0.5-dev - 081106 - $Revision: 289630 $

Is this client embeded in php_mysql.dll?

Here is the verion of PHP I'm using:

C:\Users\johnma>php -v
PHP 5.3.1 (cli) (built: Nov 19 2009 10:17:43)
Copyright (c) 1997-2009 The PHP Group
Zend Engine v2.3.0, Copyright (c) 1998-2009 Zend Technologies

Thank you,
John

Reproduce code:
---------------
<?php
echo "Hello there ...\n";

$dbhost = 'localhost';
$dbuser = 'xxx';
$dbpass = 'xxx';
$dbname = 'xxx';

echo "Attempting to connect to host=\"{$dbhost}\"\n";
$conn = mysqli_connect( $dbhost, $dbuser, $dbpass );

if( !$conn ) {
    printf( "Connect to mysqli failed: %s\n", mysqli_connect_error() );
    exit();
}

mysqli_select_db( $conn, $dbname );
$result = mysqli_query( $conn, "Select distinct date from statistics" );
if( !$result ) {
    echo mysqli_error( $conn );
    exit;
}

while( ($row = mysqli_fetch_assoc( $result )) != NULL ) {
    echo "\"{$row['date']}\" );\n";
}

exit();
?>


Expected result:
----------------
C:\Users\johnma>php -f test.php
Hello there ...
Attempting to connect to host="localhost"
"2009-04-01" );
"2009-04-02" );
"2009-04-03" );
"2009-04-04" );
"2009-04-05" );


Actual result:
--------------
C:\Users\johnma>php -f test.php
Hello there ...
Attempting to connect to host="localhost"
PHP Warning:  mysqli_connect(): [2002] A connection attempt failed because the connected party did not  (trying to connect via tcp://localhost:3306) in C:\Users\johnma\test.php on line 10
PHP Warning:  mysqli_connect(): (HY000/2002): A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.
 in C:\Users\johnma\test.php on line 10
Connect to mysqli failed: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.