<?php
DEFINE('DB_HOST', 'host');
DEFINE('DB_USER', 'user');
DEFINE('DB_PASSWORD', 'password');
DEFINE('DB_NAME', 'db_name);
$mysqli=new MySQLi(DB_HOST,DB_USER,DB_PASSWORD,DB_NAME);
if($mysqli->connect_error){
echo $mysqli->connect_error;
}
$sql_info="select * from table";
$r_info=mysqli_query($mysqli,$sql_info);