Table class

<?php
/** Class table **/
include_once("db.php");

class DbTable{
    private $table_name;
    private $query;
    private $db;

    function __construct($table_name){
        $this->db = new DataBase();
        $this->table_name = $table_name;
    }

    /**
    Prepare and execute query

    @param query SQL
    @param query_array array
    **/
    function _query($query, $query_array = ""){
        try{
            $this->db->query("SET NAMES UTF8");
            if ($query_array != ""){
                $rqq = $this->db->prepare($query);
                $rqq->execute(array($query_array));
            }
            else{
                $this->db->query($query);
            }
            return true;
        }
        catch(Exception $e){
            die("Error : " . $e->getMessage());
            return false;
        }

    }

    /**
    Show spécific item

    @param item_name string
    **/
    function show_item($item_name){
        $rqq = "SELECT ".$item_name." FROM ".$this->table_name;
        $found_item = $this->_query($rqq);
        return $found_item;
    }

    /**
    Add item

    @param item_attr string
    @param item_val string
    **/
    function add_item($item_attr="", $item_val=""){
        $rqq = "INSERT INTO " . $this->table_name . "(" . $item_attr . ") VALUES (".$item_val.")";
        try{
            $this->_query();
        }
        catch(Excepetion $e){
            die('Error : '.$e->getMessage());
            return false;
        }
    }
    function update_item(){
        // WIP
    }
    function remove_item(){
        // WIP
    }
    function list_item(){
        $rqq = "SELECT * FROM ".$this->table_name;
        $list_item = $this->query($rqq);
        return $list_item;
    }
}
?>