Exports MySQL Users and Privileges using PDO

exportMySQLUsersPDO.php

 * Feel free to improve it.
 * Original by Janich: https://gist.github.com/janich/6121771
 *
 * @requires PHP 5.3+
 * @package ExportMySQLUsers
 * @author Zaid Daba'een
 * @license http://www.dbad-license.org/ DBAD license
 */
// Set up database root credentials
$host = 'localhost';
$user = 'root';
$pass = 'YOUR PASSWORD';
// ---- Do not edit below this ----
// Misc settings
header('Content-type: text/plain; Charset=UTF-8');
// Final import queries goes here
$export = array();
// Connect to database
try {
    $link = new PDO("mysql:host=$host;dbname=mysql", $user, $pass);
} catch (PDOException $e) {
    printf('Connect failed: %s', $e->getMessage());
    die();
}

// Get users from database
$statement = $link->prepare("select `user`, `host`, `password` FROM `user`");
$statement->execute();
while ($row = $statement->fetch())
{
    $user   = $row[0];
    $host   = $row[1];
    $pass   = $row[2];
    $export[] = 'CREATE USER \''. $user .'\'@\''. $host .'\' IDENTIFIED BY \''. $pass .'\'';
    // Fetch any permissions found in database
    $statement2 = $link->prepare('SHOW GRANTS FOR \''. $user .'\'@\''. $host .'\'');
    $statement2->execute();
    if ($row2 = $statement2->fetch())
    {
        $export[] = $row2[0];
    }
}

$link = null;
echo implode(";\n", $export);

Error on line 38
if ($row2 = $statement2->fetch())
Must be
while ($row2 = $statement2->fetch())

If mysql version > 5.6
On line 27 must be
$statement = $link->prepare("select user, host, authentication_stringFROMuser");
(not field password in table User)