public function select($table, $select, $where, $conjunction = 'AND'){

        $keys = array_keys($where);
        $pairs = Array();
        foreach($keys as $key){
            $pairs[] = "{$key}=:{$key}";
        }//foreach
        $pairs = implode(" {$conjunction} ",$pairs);

        if(is_array($select)){
            $select = implode(',',$select);
        }//if

        return $this->query($this->set("SELECT {$select} FROM {$table} WHERE {$pairs}",$where));

    }