Can't connect to MySQL with PDO - php

Question

I'm following this tutorial, I'm currently around minute 04:00 and I want to make a connection with my MySQL database through PDO. But my webpage will always give "Could not connect." when I'm trying to make the connection.
When I used PHPStorms inside Database program, I had to change my serverTimezone to Europe/Amsterdam and then I was able to connect to my db.
I tried to add the port number in the 'new PDO()' code.
I tried to change the timezone in the code and on my MySQL server but it gives this error;
mysql> SET GLOBAL time_zone = 'Europe/Amsterdam';
ERROR 1298 (HY000): Unknown or incorrect time zone: 'Europe/Amsterdam'
<?php
try {
$pdo = new PDO('mysql:host=localhost:dbname=mytodo', 'root', '');
} catch (PDOException $e) {
die('Could not connect.');
}
$statement = $pdo->prepare('select * from todos');
$statement->execute();
var_dump($statement->fetchAll());
require 'index.view.php';
Extra information:
mysql> SELECT ##global.time_zone, ##session.time_zone;
+--------------------+---------------------+
| ##global.time_zone | ##session.time_zone |
+--------------------+---------------------+
| SYSTEM | SYSTEM |
+--------------------+---------------------+

Answer 1

The tutorial you are following is very outdated.
A code connecting to PDO has to follow certain rules explained in my article How to connect to MySQL with PDO. In brief
it should configure error reporting mode
it should set the connection charset, the right way
it shouldn't catch it's own errors to report them
it should follow correct DSN syntax, without any extra decorations
it also coud set a couple useful settings
So the code should be like this
$host = '127.0.0.1';
$db = 'mytodo';
$user = 'root';
$pass = '';
$charset = 'utf8mb4';
$options = [
\PDO::ATTR_ERRMODE => \PDO::ERRMODE_EXCEPTION,
\PDO::ATTR_DEFAULT_FETCH_MODE => \PDO::FETCH_ASSOC,
\PDO::ATTR_EMULATE_PREPARES => false,
];
$dsn = "mysql:host=$host;dbname=$db;charset=$charset";
$pdo = new \PDO($dsn, $user, $pass, $options);
Here you can see the proper connection code that does a lot of things. Among them, it tells you what the actual problem is when your code cannot connect to database.

Answer 2

You have error in code near localhost
Use semicolon in place of colon
Write this instead:
$pdo=new PDO('mysql:host=localhost;dbname=mytodo','root','');