<?php
$folder_path = '../images/'; //image's folder path
switch($_POST['PAGE'])
{
case "intro":
$folder_path .= "intro/";
break;

case "story":
default:
$folder_path .="story/";
break;
}

$num_files = glob($folder_path . "*.{JPG,jpg,gif,png,bmp}", GLOB_BRACE);

$folder = opendir($folder_path);

if($num_files > 0)
{
while(false !== ($file = readdir($folder)))
{

 /*$foil = strstr($file, 'jpg'); 
 $foil = $file; */

$file_path = $folder_path.$file;
$extension = strtolower(pathinfo($file ,PATHINFO_EXTENSION));
if($extension=='jpg' || $extension =='png' || $extension == 'gif' || $extension == 'bmp')
{
?>

<div class="multi-col">
<form action="delete_image.php" method="post">
<input class="checkbox" type="checkbox" name="check_list[]" value="<?php echo $file_path; ?>" /><?php echo "<img width='200' height='150' src='$file_path' />";?>
<input type="submit" value="Delete Image" name="delete">
</form>
</div>

    <?php       

}
}
}

closedir($folder);
?>

A seguire il file delete.php:

<?php

/------------------------/

if(!empty($_POST['check_list'])) {
// Counting number of checked checkboxes.
$checked_count = count($_POST['check_list']);
echo $checked_count;
echo "You have selected following ".$checked_count." option(s): <br/>";
// Loop to store and display values of individual checked checkbox.
foreach($_POST['check_list'] as $selected) {
echo "<p>".$selected ."</p>";
}

if(isset($_POST['delete'])){
if (file_exists($selected)) {
unlink("$selected");
echo '<script language="javascript">';
echo 'alert("File eliminato con successo")';
echo '</script>';
echo "<script>window.location.href = '../pages/intro_upload.php';</script>";
}

echo "<br/><b>Note :</b> <span>Similarily, You Can Also Perform CRUD Operations using These Selected Values.</span>";
}
else{
echo "<b>Please Select Atleast One Option.</b>";
}
}
?>

Vorrei inoltre capire come ottenere un solo bottone Cancel preposto alla cancellazione multipla perchè allo stato attuale vengono generati tanti bottoni cancel quanti sono i file stampati a video.
Grazie!