conexion MySQL

[towel]

neceito coenctarme a Mysql pero noc que esta malo aca kien me ayuda ???
<?php
class class_conexion
{
/*public $bd_id;
public $bd_select;
public $filas;
private $bd_host;
private $bd_usuario;
private $bd_contrasena;
private $bd_base;
public $bd_registros;
public $bd_cadena;*/

function class_conexion()
{
if(!isset($this->bd_id))
{
$this->bd_host = "localhost";
$this->bd_usuario = "root";
$this->bd_contrasena = "towel";
$this->bd_base = "fanclub";
echo "hola";
$this->bd_id = mysql_connect($this->bd_host, $this->bd_usuario, $this->bd_contrasena) ;
$this->bd_select = mysql_select_db($this->bd_base, $this->bd_id)or die("NO SE PUDO CONECTAR");
}
}
public function ejecutar_sql($consulta)
{
echo "hola = ".$consulta;
$this->bd_registros = mysql_query($consulta, $this->bd_id) or die("NO SE PUDO CONECTAR");
return $this->bd_registros;

}

public function fetch_array()
{
$this->bd_cadena = mysql_fetch_array($this->bd_registros);
return bd_cadena;
}

public function num_rows()
{
//mysql_query($consulta, $this->bd_id);
$this->bd_clumnas = mysql_num_rows($this->bd_registros);
return $this->bd_clumnas;
}

/*public function fila()
{
return mysql_fetch_array($this->bd_registros);
}*/

/*public function ejecutar($consulta)
{
mysql_query($consulta, $this->bd_id);
$this->filas = mysql_num_rows($this->bd_id);
}*/
}
?>