New filters to extend Add New Site Network Screen (wp-admin/network/site-new.php)

[igmoweb]

Some plugins may need to add new fields in this screen. I attach a patch with two new hooks:

• network_after_site_new_form : Allows to add new fields before submit button is displayed and form tag is closed
• network_site_new_blog_meta : We can pass the value of those fields to the meta array before creating a blog

[igmoweb]

Extend site-new.php patch

[igmoweb]

And here's a use case: ​https://gist.github.com/igmoweb/9db3bc38a632b717d01c

It creates a Theme dropdown in that screen. The Super Admin can select the theme before creating the blog.

[jeremyfelt]

Thanks for the ticket and patch, @igmoweb, this is definitely worth thinking about. #15389 is related, though I like that this ticket is more focused on just the new site form. I thought there was another related ticket, but nothing is popping up for me at the moment.

I'm not sure about the filter for $meta. Anything hooking in to network_after_site_new_form could probably also hook into wpmu_new_blog to look for additional POST data.

[igmoweb]

Removed network_site_new_blog_meta filter. Can make use of wpmu_new_blog instead

[igmoweb]

Yeah, I thought about it better after I uploaded the first patch. I've removed it in the latest patch ( 34739.patch).

Also updated the use case: ​https://gist.github.com/igmoweb/9db3bc38a632b717d01c

Thanks.

[ocean90]

34739.2.patch​ is a refresh of 34739.patch​. It removes "after" from the filter name so we have the same terminology as for ​user_new_form.

Any objections @jeremyfelt?

[jeremyfelt]

None from me - 34739.2.patch​ looks good.

[jeremyfelt]

In 36555:

Multisite: Add a hook to the end of the Add Site form.

The network_site_new_form action can be used to extend the new site form.

Props igmoweb, ocean90.
Fixes #34739.

[neelakansha85]

A suggestion: This would display all the themes in multisite network even if they are not enabled by super admins. With the below change it can be useful in the front end as well on wp-signup.php page.
Here is a code change I would recommend:

<?php foreach ( $themes as $theme ): ?>
    <?php if($theme->is_allowed()):?>
        <option value="<?php echo esc_attr( $theme->get_stylesheet() ); ?>"><?php echo $theme->title; ?></option>
    <?php endif; ?>
<?php endforeach; ?>

Also I am working on something related to breaking the create new site page into steps ​https://github.com/neelakansha85/nsd-site-setup-wizard not sure if this would be helpful feature for the core.