-1

What is the easiest approach to iterate through the sub-sites (in Multi-Site network) and let's say add_option("xyz", 123) for each of site.

1

Well, you can get sites with get_sites and loop through them:

if ( function_exists( 'get_sites' ) && class_exists( 'WP_Site_Query' ) ) {
    $sites = get_sites();
    foreach ( $sites as $site ) {
        // do something
    }
    return;
}
0

I've found this so far to work for me:

foreach (get_sites() as $blog){
    switch_to_blog($blog->blog_id);
    // get_option (...)   
    restore_current_blog();
}
  • The only problem with this is that you use switch_to_blog which is very very bad for performance... And you don't need it to set option... – Krzysiek Dróżdż Feb 5 at 8:31
  • @KrzysiekDróżdż forget the "get_option". what are alternatives for itteration then without switch_to_blog ? So loop could be used. – T.Todua Feb 6 at 18:39

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