看看wp_upload_dir 在这里https://developer.wordpress.org/reference/functions/wp_upload_dir/

$upload_dir = wp_upload_dir();

var_dump( $upload_dir );

/*
$upload_dir will comprise of the following return values:

\'path\'    - (string) Base directory and subdirectory or full path to upload directory.
\'url\'     - (string) Base URL and subdirectory or absolute URL to upload directory.
\'subdir\'  - (string) Subdirectory if uploads use year/month folders option is on.
\'basedir\' - (string) Path without subdir.
\'baseurl\' - (string) URL path without subdir.
\'error\'   - (string|false) False or error message.
*/