?php
if(isset($_GET['ordre'])) {
        if($_GET['ordre'] == "DESC") {
                $ordre = "DESC";
        } elseif($_GET['ordre'] == "DESC") {
                $ordre = "ASC";
        } else {
                $ordre = "DESC";
        }

<?php
if(isset($_GET['ordre'])) {
	if($_GET['ordre'] == "DESC") {
		$ordre = "DESC";
	} elseif($_GET['ordre'] == "DESC") {
		$ordre = "ASC";
	} else {
		$ordre = "DESC";
	}
} else {
	$ordre = "DESC";
}
if(isset($_GET['tri'])) {
	if($_GET['tri'] == "id") {
		$tri = "id";
	} elseif($_GET['tri'] == "nom") {
		$tri = "nom";
	} elseif($_GET['tri'] == "actif") {
		$tri = "actif";
	} else {
		$tri = "id";
	}
} else {
	$tri = "id";
}
?>
<table>
	<tr>
		<td colspan="3" align="center">Trier par: 
		<a href="page.php?tri=id&ordre=<?php echo $ordre; ?>">ID</a> - 
		<a href="page.php?tri=nom&ordre=<?php echo $ordre; ?>">Nom</a> - 
		<a href="page.php?tri=actif&ordre=<?php echo $ordre; ?>">Actif</a>
		
		<br />Trier par ordre: 
		<a href="page.php?tri=<?php echo $tri; ?>&ordre=ASC">Croissant</a> - 
		<a href="page.php?tri=<?php echo $tri; ?>&ordre=DESC">D&eacute;croissant</a>
		</td>
	</tr>
	<tr>
		<th>ID</th>
		<th>Nom </th>
		<th>Actif</th>
	</tr>
<?php
$Verif = mysql_query("SELECT * FROM table ORDER BY ".$tri." ".$ordre."");
if(mysql_num_rows($Verif) == 0) {
	?>
	<tr>
		<td colspan="3" align="center">Aucun enregistr&eacute;ement</td>
	</tr>
	<?php
} else {
	while($Infos = mysql_fetch_assoc($Verif)) {
	?>
	<tr>
		<td><?php echo $Infos['id']; ?></td>
		<td><?php echo $Infos['nom']; ?></td>
		<td><?php echo $Infos['actif']; ?></td>
	</tr>
	<?php
	}
}
?>
</table>