I have a project to complete where sites within a WordPress Multisite blog will automatically add users to the corresponding sites (where the plugin is enabled)

I hope I worded that correctly.

The problem: The wpmu_new_user hook does not fire inside of a plugin but WILL inside of functions.php

This is my code:

 add_action( 'wpmu_new_user', 'register_hack_action', 10, 1 );
 add_action( 'wpmu_activate_user', 'register_hack_action', 10, 1);
 function register_hack_action( $user_id ) {
$this_id = get_current_blog_id();
if ( !defined('ABSPATH') ) {
    // do nothing
} else {
    include_once( ABSPATH . 'wp-admin/includes/plugin.php' ); 
$blog_list = get_blog_list( 0, 'all' );
foreach ($blog_list AS $blog) {
    if ( is_plugin_active( 'register-hack/register-hack.php' ) ) {
        // add user to blog
        add_user_to_blog($blog['blog_id'], $user_id, 'subscriber');

This works perfectly fine when you add the snippet to functions.php. But when you add it to a plugin (which goes into wp-content/plugins) and then is activated on certain sites, just will not work. if you can try it for yourself you’ll see what i mean.. I don’t understand why it will not work. I need it to be inside of the plugin and work.

Read more here: Why does wpmu_new_user not fire inside of a plugin but does inside functions.php?


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