How can I remove incomprehensible (to me) files from a folder?

Question

PHP

Guys tell me how to get rid of what I highlighted in the photo! I can not understand what it was thinking hidden files changed the configuration, but there are only two files in the folder that I uploaded! when deleting these files, these 2 files still remain with an incomprehensible extension! here is the code:
<?php unset($dir); $direct = "data" . DIRECTORY_SEPARATOR; ?>
<?php if (is_dir($direct)): ?>
<?php if ($dh = opendir($direct)): ?>
<?php while (($file = readdir($dh)) != = false): ?>
<?php echo $file . ": "; ?>
<?php endwhile; ?>
<?php endif; ?>
<?php endif; ?>

Answer 1

. - current directory
.