library includes classes for working with MySQL,MySQLI,PDO
##Using ###Сonnection
include_once(dirname(__FILE__)."/path_to_db/db/DB.php");
$o=array(
'host'=>'Your host database',
'dbname'=>'Your database',
'port'=>3306, //Your port database
'user' => 'Your user database',
'password' => 'Your password database',
'charset'=>'utf8', //Your charset database
'driver'=>'pdo_mysql' //Use driver (Default pdo_mysql)
);
$db=DB::connect($o);
###Retrieving data