trigger default mysql datetime value when not null with php pdo

Question

I'm trying to learn PDO and apply to an existing Joomla database table ("users"), just for learning purposes. However I keep getting errors with regard to the "lastResetTime" column.

23000 SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'lastResetTime' cannot be null

When the default system makes a user the default value is set to 0000-00-00 00:00:00, although the settings are NOT NULL.

For some reason I cannot pass this value (0000-00-00 00:00:00) in my queries. This is what I have. Could anyone tell me how I can trigger the default value, despite the facct that I cannot provide NULL, nor 0000-00-00 00:00:00 (which is strictly invalid if I'm correct)

<?php
require 'PDO.php';

$table = $prefix."users";

$pdo = new PDO($dsn,$user,$pass,$opt);

$stmt = $pdo->prepare("INSERT INTO $table (username, email, params, registerDate, lastvisitDate, lastResetTime) VALUES(?, ?, ?, now(),now(), ?)");
$stmt->execute(["lalaa","aaaa","",NULL]);

The table is formated as follows:

 CREATE TABLE `x7j4o_users` (
 `id` int(11) NOT NULL,
 `name` varchar(400) COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT '',
 `username` varchar(150) COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT '',
 `email` varchar(100) COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT '',
 `password` varchar(100) COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT '',
 `block` tinyint(4) NOT NULL DEFAULT '0',
 `sendEmail` tinyint(4) DEFAULT '0',
 `registerDate` datetime NOT NULL DEFAULT '0000-00-00 00:00:00',
 `lastvisitDate` datetime NOT NULL DEFAULT '0000-00-00 00:00:00',
 `activation` varchar(100) COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT '',
 `params` text COLLATE utf8mb4_unicode_ci NOT NULL,
 `lastResetTime` datetime NOT NULL DEFAULT '0000-00-00 00:00:00' COMMENT      'Date of last password reset',
 `resetCount` int(11) NOT NULL DEFAULT '0' COMMENT 'Count of password resets since lastResetTime',
 `otpKey` varchar(1000) COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT '' COMMENT 'Two factor authentication encrypted keys',
 `otep` varchar(1000) COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT '' COMMENT 'One time emergency passwords',
 `requireReset` tinyint(4) NOT NULL DEFAULT '0' COMMENT 'Require user to   reset password on next login'
)     
ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

UPDATE The following doesn't seem to work also

$stmt = $pdo->prepare("INSERT INTO $table (name, username,registerDate,lastvisitDate,lastResetTime) VALUES(?,?,DEFAULT,DEFAULT,DEFAULT)");
$stmt->execute(['aaaa','aaaaaaaa']);

it triggers the error:

22007 SQLSTATE[22007]: Invalid datetime format: 1292 Incorrect datetime value: '0000-00-00 00:00:00' for column 'registerDate' at row 1

If anyone knows how I can use the default value as set in mysql I would be very greatfull.

Answer 1

The answer has apparently something to do with PDO

The solution is the following line:

PDO::MYSQL_ATTR_INIT_COMMAND => "SET sql_mode=''"

Always great to waste 1 complete day ;)

In my code it is embeded here:

$opt = [
PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,
PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
PDO::ATTR_EMULATE_PREPARES   => false,
PDO::MYSQL_ATTR_INIT_COMMAND => "SET sql_mode=''"
];

Although this fixed the problem, I'm hesitant to say it is a solid solution. If have read https://codeascraft.com/2013/03/19/the-perils-of-sql_mode/ which thought me the dangers of sql_mode set to null. This seems to be the architecture of the tables I use, which is supplied by Joomla CMS