Get latest file in dir including subdirectory php

i found out that i can use

$files = scandir('c:\myfolder', SCANDIR_SORT_DESCENDING);
$newest_file = $files[0];

to get the latest file in the given directory ('myfolder'). is there an easy way to get the latest file including subdirectorys?

like:

myfolder> dir1 > file_older1.txt

myfolder> dir2 > dir3 > newest_file_in_maindir.txt

myfolder> dir4 > file_older2.txt

Thanks in advance

source https://stackoverflow.com/questions/69003206/get-latest-file-in-dir-including-subdirectory-php