Recursively Create Directories Failed or Not Supported

[marsteel]

To reproduce
Tiny File Manager 2.6

Create New Item
Item Type - Folder
Item Name - /sftpgo/sftpgodata

Folder sftpgosftpgodata is created

[smalos]

In the code, there is a cleaning step for the folder name before creation:

$new = str_replace('/', '', fm_clean_path(strip_tags($_POST['newfilename'])));

This line removes all slashes (/) from the folder name. As a result, the input /sftpgo/sftpgodata becomes sftpgosftpgodata.

The question is whether this behavior is intentional for security reasons, or if nested folder creation should be permitted.