How can I copy a file from one site to another using php?

Question

PHP

Good afternoon!
There is a sitename.com site, which has an index.php file in the source folder
There is a site on a subdomain - abc.sitename.com - there are only a couple of files and folders
You need to use the php script that is in sitename.com
1) delete all files and folders from abc.sitename.com
2) copy index.php from sitename.com/source to abc.sitename.com
read everything you need to work with files - delete / copy, etc. - I can, but within 1 site...
but how to get to the file structure of the site on a subdomain - I'll never know ....

Answer 1

The site is on the same server. For example - if you run from the file sitename.com/test.php :

copy( './source/index.php', '../abc.sitename.com/index.php' );

Answer 2

If there is no direct access through the FS, you can, for example, connect via FTP to one or both sites.