PHP-如何第一次首次创建mysqli数据库？

我正在从mysqli tutorial运行一个示例.

$MysqLi = new MysqLi("localhost", "user", "password", "database");
if($MysqLi->connect_errno)
{
  echo "Failed to connect to MysqL: (" . $MysqLi->connect_errno . ) "
  . $MysqLi->connect_error;} echo $MysqLi->host_info . "\n";
} 

我收到错误：

Warning: MysqLi::MysqLi(): (42000/1049): UnkNown database ‘world’ in /home/…

我应该怎么做才能创建数据库？

解决方法:

您必须使用此：

$MysqLi=new MysqLi("localhost","user","password") or die(".........");

if($MysqLi->query("Create database if not exists MyDB")){

   "Failed creating new database: ".$MysqLi->connect_errno();
    die();

}

$MysqLi->select_db("MyDB");
$MysqLi->close();