MySQL and PHP returning HTTP error 500

I’m trying to connect to my MySQL database with php, and I’m getting a http 500 error, and the following in the error log.

[Sat Aug 11 07:33:08.899904 2018] [php7:error] [pid 18763] [client] PHP Fatal error:  Uncaught PDOException: SQLSTATE[HY000] [1698] Access denied for user 'root'@'localhost' in /var/www/html/createaccount.php:14\nStack trace:\n#0 /var/www/html/createaccount.php(14): PDO->__construct('mysql:host=127....', 'root', 'password123', Array)\n#1 {main}\n  thrown in /var/www/html/createaccount.php on line 14

This is the code for createaccount.php

$host = '';
$db   = 'databaseDB';
$user = 'root';
$pass = 'password123';
$charset = 'utf8mb4';

$dsn = "mysql:host=$host;dbname=$db;charset=$charset";
$opt = [
$pdo = new PDO($dsn, $user, $pass, $opt);

And I can log in with mysql -u root -p and then entering the password password123. So I know it’s the password, or at least I think so, why else would it let me log in.

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Hi @accidentallycompiled,

The bellow steps should help you solve your problem

  • Open & Edit /etc/my.cnf or /etc/mysql/my.cnf, depending on your distro.
  • Add skip-grant-tables under [mysqld]
  • Restart Mysql
  • You should be able to login to mysql now using the below command mysql -u root -p
  • Run mysql> flush privileges;
  • Set new password by ALTER USER ‘root’@‘localhost’ IDENTIFIED BY ‘NewPassword’;
  • Go back to /etc/my.cnf and remove/comment skip-grant-tables
  • Restart Mysql

Once done, make sure root has all the needed privileges like so


You’ll need to be in MySQL to execute the above command

Regards, KDSys