What are the possible reasons for the script not executing as expected when files are selected for deletion?

The script may not be executing as expected when files are selected for deletion due to incorrect file paths, insufficient permissions to delete files, or errors in the deletion logic. To solve this issue, ensure that the file paths are correct, check and adjust file permissions if needed, and review the deletion logic for any errors.

<?php
$files = $_POST['files'];

foreach ($files as $file) {
    $filepath = '/path/to/files/' . $file;
    
    if (file_exists($filepath) && is_writable($filepath)) {
        unlink($filepath);
        echo "File $file has been deleted successfully.";
    } else {
        echo "Unable to delete file $file. Check file path and permissions.";
    }
}
?>