Hashing＆amp; Salting Passwords并插入数组。

Question

我在stackoverflow

上有一个测试注册表

How do I create and store md5 passwords in mysql

我现在正试图让它在这个数组中为我正在尝试更新的现有注册表单工作。有人能让我知道我哪里出错吗？

<?

        $fields_array = array();
        $values_array = array();
        while ($row = mysql_fetch_array($result_content))   {

        switch ($row['type'])   {
            case 'password':

    $field_value = $vars[$row['name']];
        $confirm_field_value = $vars['confirm_' . $row['name']];

        //start hashing and salting testing

        $salt = bin2hex(mcrypt_create_iv(32, MCRYPT_DEV_URANDOM));

        $saltedPW = $field_value . $salt;

        $hashedPW = hash('sha256', $saltedPW);

        $field_value = $hashedPW . $salt;

        //finish hashing and salting testing

        break;
        default:
        $field_value = $vars[$row['name']];
        if ($row['class'] == 'date' && $row['size'] > 0
            $field_value .= ' ' . $vars[$row['name'] . 'Time'];
        }
    $fields_array[] = $row['name'];
    $values_array[] = "'$field_value'";

    }   



    if (count($error) == 0 && count($fields_array) > 0) {
        $fields_array[] = 'created_date';
        $values_array[] = "'" . date ('Y-m-d H:i:s') . "'";
        $fields_array[] = 'created_ip_number';
        $values_array[] = "'" . $_SERVER['REMOTE_ADDR'] . "'";
        $fields = implode (", ", $fields_array);
        $values = implode (", ", $values_array);
        $result = $db->insertByStrings($table_title, $fields, $values)
        or die('Error in ' . implode (' > ', $this_routine) . ": inserting record into $table_title failed<br/>
            Query: INSERT INTO $table_title ($fields) VALUES ($values)<br/>
            Error: (" . $db->getLastErrorCode() .") " . $db->getLastError());
        $user_id = mysql_insert_id();
    }

    ?>