-3
$DB_HOST = "localhost";
$DB_USER = "root";
$DB_PASSWORD = "";
$DB_NAME = "practice";
$conn = new mysqli($DB_HOST,$DB_USER,$DB_PASSWORD,$DB_NAME);
if ($conn->connect_errno) {
printf("Connect failed: %s\n", $conn->connect_error);
exit();
}else{
//printf("connected!!!");
}
function ...