index.php

<?php

$db_host = "localhost";
$db_username = "pma";
$db_password = "pma021";
$db_name = "sekola";

$db_connection = mysqli_connect($db_host,$db_username,$db_password,$db_name);

if(mysqli_connect_errno()){
    echo 'Database connection failed: '.mysqli_connect_error();
    exit();
} else {
    echo "Database connection succeed";
}

 ?>