Suppression

<form method="post" action= "modifie.php">
<input id="delete" type="submit"  name="delete" value="Supprimer"/>
</form>
<center>

 <?php 



$res = $dbh->prepare("select * from article ");

$res->execute();
echo"<center>";
echo"<form action='modifie.php' method='post'><table BORDER=1 >";

echo"<tr><td>supprimer</td><td>Text</td><td>Image</td><td>Editer </td></tr>";


while($l = $res->fetch())
{
echo"<tr><td><input type='checkbox' name='checkbox[]' id='checkbox[]' value='$l[0]'>";
if(isset($_POST['supprime']))

 {
$sup=$_POST['check'];
 
$suppr = $dbh->prepare('Delete from article where id_art = :id'); 
$suppr->execute(array('id' => $sup));



}
echo"</td>
<td>$l[1]</td>";

$img = "../../assets/images/$l[2]";
   
echo"<td><center><img src='$img' width=50 height=50 ></td>

<td><a href='Mconduite.php?a=$l[0]'><img src='../images/editer.png' title='Editer'/></a></td>

</tr>";
}
echo"</table></form>";





  ?>           
<?php
 

   
 if(isset($_POST['delete'])) // from button name="delete"
 {
  $checkbox = $_POST['checkbox']; //from name="checkbox[]"
 $countCheck = count($_POST['checkbox']);
  
  for($i=0;$i<$countCheck;$i++)
  {
   $del_id  = $checkbox[$i];
   
   $suppr = $dbh->prepare('DELETE from article where id_art = $del_id'); 
   $suppr->execute();
   
   
   
  }
   
 }
?>