Where do I get my mysql_num_rows() from my class?

I have my table Articulo with three fields:
Id (Autoincrement/Primary Key)
codigo (Unique)
nombre

I want to enter a code (codigo) and find if this code already exist in my table (Articulo). If exist run template1, if doesn't exist run template2.

verificar.php:

<?php
require_once "../config.php";
$dao = new ArticuloClass();
$u = $dao->verificar($_POST['codigo']);

...... I want to put here is mysql_num_rows=1 or mysql_num_rows=0;

PHP:

ArticuloClass.php

<?php
class ArticuloDAO {
    function ArticuloDAO() {
    }
    function verificar($criterio){
       $query = "SELECT id, codigo, nombre FROM articulos WHERE codigo = '$criterio'";
       $BD = new ConexionDB();
       $recordSet = $BD->dbLink->Execute($query);
       if (!$recordSet){
                        Debug::println("No se pudo ejecutar la consulta Verificar: " . $query);
                        return false;
                       }
       return mysql_num_rows($recordSet);   [B][COLOR="red"]/// REturn if exist or not[/COLOR][/B]
    }

PHP:

The query run here ConexionDB.Class.php:

<?php
require_once ADODB_BASEFILE;
class ConexionDB {
    var $dbLink;
    function ConexionDB(){
        $this->dbLink = ADONewConnection(DB_TYPE);
        $this->dbLink->SetFetchMode(ADODB_FETCH_ASSOC);
        $dbconnected = $this->dbLink->PConnect(DB_HOST, DB_USER, DB_KEY, DB_DATA);
        if (!$dbconnected){
            Debug::println('No se pudo conectar a la Base de Datos');
            exit(0);
        }            
    }    
}
?>

PHP:

This code use smarty/php.
I hope somebody can help me.

 

$qu = mysql_query("SELECT * FROM articulos WHERE codigo = '$_POST['codigo']'");
$outcome = mysql_num_rows($qu);
if ($outcome == 0){
echo "There was no entry in the database";
} else {
echo "There was an entry";
}

Code (markup):

Should be what you want.

 

Excellent, but your code where I put inside my code ??

 

$qu = mysql_query("SELECT * FROM articulos WHERE codigo = '$_POST['codigo']'");
$outcome = mysql_num_rows($qu);
if ($outcome == 0){
//If there are no results then edit this here
echo "There was no entry in the database";
} else {
//If there is a match then edit this
echo "There was an entry";
}

Code (markup):

Hope that helps