I have a litle aplication for rental cars in php.

My problem is condicion of if, elseif e else, because else downt working.
-------------------------------------------------------------------------

```
<?php
if (empty($busca)) {
echo 'Coloque uma palavra-chave para podermos procurar o seu carro.<br>';
}
elseif ($busca= 'empty' OR $sql == 0) {
echo 'Nao encontramos valores na nossa base de dados.<br>';
}
else{
echo "<table width=\"100%\" border=\"0\" cellspacing=\"1\" cellpadding=\"0\" bgcolor=\"#000033\">
<tr bgcolor=\"#0066FF\">
<th><b><font color=\"#FFFFFF\">Marca</font></b></th>
<th><b><font color=\"#FFFFFF\">Modelo</font></b></th>
<th><b><font color=\"#FFFFFF\">Classe</font></b></th>
<th><b><font color=\"#FFFFFF\">Matricula</font></b></th>
<th><b><font color=\"#FFFFFF\">Ver</font></b></th>
</tr>";
while ($row = mysql_fetch_assoc($rs_result))
{
echo "<tr bgcolor=\"#0066FF\">";
echo "<td bgcolor=\"#FFFFFF\">" . $row['marca'] . "</td>";
echo "<td bgcolor=\"#FFFFFF\">" . $row['modelo'] . "</td>";
echo "<td bgcolor=\"#FFFFFF\">" . $row['classe'] . "</td>";
echo "<td bgcolor=\"#FFFFFF\">" . $row['matricula'] . "</td>";
echo ("<td bgcolor=\"#FFFFFF\"><a href=\"http://localhost/autorental/index.php?pagina=veiculo&matricula=$row[matricula]\">Ver</a></td>");
echo "</tr>";
}
echo "</table>";
}
?>

```