- var_dump: documentation ( source)
<?php
$tquery = $this->db->select('*')
->from('pm_project')
->where_not_in('pm_project_user_link.project_id',$project_id)
->join('pm_project_user_link', 'pm_project.id = pm_project_user_link.project_id', 'left outer')
->join('pm_users', 'pm_project_user_link.user_id = pm_users.id', 'right outer')
->get();
var_dump($tquery);