This page redirects to an external site: https://developer.wordpress.org/reference/functions/validate_file_to_edit/
Make sure that the file that was requested to edit, is allowed to be edited.Function will die if if you are not allowed to edit the file.
<code style="color: #000000"> <span style="color: #0000BB"><?php validate_file_to_edit</span><span style="color: #007700">( </span><span style="color: #0000BB">$file</span><span style="color: #007700">, </span><span style="color: #0000BB">$allowed_files </span><span style="color: #007700">); </span><span style="color: #0000BB">?></span> </code>
null.
get_file_description( $file ) is located in wp-admin/includes/file.php#L172