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<?phpclass Categorymodel extends Model {	var $id = 0;	function Categorymodel()	{		parent::Model();	}		/**	*  Save new category into database	*/		/**	*  Category By ID	*	*  Gets category from database, returns true if category exists	*  return boolean	*/	function byID( $id )	{		$query = $this->db->get_where("category",array('id' => $id));		echo $this->db->count_all_results();	}}/* END OF FILE */