<?php
$host = "127.0.0.1";
$dbname = "X";
$user = "X";
$pass = "X";
$charset = "UTF8MB4"; // if your db does not use CHARSET=UTF8MB4, you should probably be fixing that
$dsn = "mysql:host={$host};dbname={$dbname};charset={$charset}";
$options = [
  PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
  PDO::ATTR_EMULATE_PREPARES => false
];
try {
  $pdo = new PDO( $dsn, $user, $pass, $options );
} catch ( PDOException $e ) {
  error_log( $e->getMessage() );
}