<?
error_reporting(E_ALL);
// Utilzando switch
if(!isset($_POST['envio']))
{
?>
<form method="POST" action="<?php echo $_SERVER['PHP_SELF'] ?>">
<table border="0" width="100%">
<tr>
<td width="39%">
<p align="right">Ingrese el Número del día de la semana</td>
<td width="61%"><select size="1" name="numero">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
<option value="6">6</option>
<option value="7">7</option>
</select></td>
</tr>
<tr>
<td width="39%"></td>
<td width="61%"><input type="submit" value="ver el Resultado" name="envio"></td>
</tr>
</table>
</form>
<?
}
elseif(isset($_POST['numero']))
{
switch ($_POST['numero'])
{
case 1:
echo "Hoy es Lunes";
break;
case 2:
echo "Hoy es Martes";
break;
case 3:
echo "Hoy es Miercoles";
break;
case 4:
echo "Hoy es Jueves";
break;
case 5:
echo "Hoy es Viernes";
break;
case 6:
echo "Hoy es Sábado";
break;
case 7:
echo "Hoy es Domingo";
break;
}//end switch
}//end if enviar
?>