Evitar repetidas llamadas a Metodos, Persistencia y herencia seria la solucion???????

[abimaelrc]

A lo que me refiero es algo así

Código PHP:

<?php
class classConnectDb{
    private $mysql_host;
    private $mysql_user;
    private $mysql_pass;
    private $mysql_db;
    protected $connect_db;
 
    public function __construct($host, $user, $pass, $db){
        $this->mysql_host = $host;
        $this->mysql_user = $user;
        $this->mysql_pass = $pass;
        $this->mysql_db = $db;
    }
 
    public function connectDb(){
        $this->connect_db = mysql_connect($this->mysql_host, $this->mysql_user, $this->mysql_pass) or die(mysql_error());
        mysql_select_db($this->mysql_db,$this->connect_db);
    }
}
 
class query extends classConnectDb{
    protected $mysql_query;
 
    public function __construct($host, $user, $pass, $db){
        parent::__construct($host, $user, $pass, $db);
    }
 
    public function query($query){
        $this->mysql_query = mysql_query($query, $this->connect_db) or die(mysql_error());
    }
}
 
class fetch extends query{
    public function __construct($host, $user, $pass, $db){
        parent::__construct($host, $user, $pass, $db);
    }
 
    public function fetchQuery(){
        return mysql_fetch_assoc($this->mysql_query);
    }
}
 
$obj = new fetch('hostname','username','password','database');
$obj->connectDb();
$obj->query('SELECT * FROM tabla');
while($row = $obj->fetchQuery()){
    var_dump($row);
}