[CodeIgniter][solved] Unable to load the requested class: database

Finally found used the wrong syntax to import database class.

Use

$this->load->database();

Instead of

$this->load->library('database');

  


The reason why cause this error ?
We need to import "database class" but not "database library",
so use "$this->load->database();" but not "$this->load->library('database');"


Referance:
http://stackoverflow.com/questions/18045342/codeigniter-loading-database-error