gist:3910584

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.util.Date;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;

olivierobert

/** Within the controller method **/

// If this is an ajax request, then return a JSON string
if ( $this->input->is_ajax_request() ):
  $this->output->set_content_type('application/json');
  $this->output->set_output( json_encode($data) );
endif;