DBConnectPDO

<?php
$host = 'localhost'; // 127.0.0.1
$user = 'root';
$pass = '';
$port = "3306";
$db   = 'school';
$charset = 'utf8mb4';

$dsn = "mysql:host=$host;dbname=$db;charset=$charset;port=$port";
try {
     $pdo = new PDO($dsn, $user, $pass);
     echo "Success";
} catch (PDOException $e) {
    die("Problem connecting to database");
}
?>