PHP and MySql

Code example - Connect
<?php $host = "localhost"; $user = "root"; $password = ""; $database_name = "data1"; $pdo = new PDO("mysql:host=$host;dbname=$database_name", $user, $password, array( PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION, PDO::MYSQL_ATTR_INIT_COMMAND => "SET NAMES utf8" )); ?>

Hello and