Interfacing with MongoDB in CodeIgniter
You should use MongoDB PHP Driver's MongoDB::command() for passing such database commands to the mongodb server.
In CodeIgniter there are a few community-built MongoDB libraries you can use. Since I checked almost all of them, take my advise and use CodeIgniter MongoDB Active Record. Here's a sample code:
<?php// Somewhere in your model, controller, etc.// Load MongoDB library$this->load->library('mongo_db');// Query MongoDB: Active document library usage example$docs = $this->mongo_db->where('age', '33')->get('collection_name_here'); // Query MongoDB: Command usage example$docs = $this->mongo_db->command(array( 'geoNear' => 'buildings', 'near' => array(53.228482, -0.547847), 'num' => 10, 'nearSphere' => TRUE,));// Theme results, pass to the view, etc.Here are a few other libraries around that you might want to use alongside the active record one: