php - How to call plugin function per site in a multisite?

My goal is to be able to call a plugin function per site and of course it has different result based on the site data.

e.g.

I have a plugin called: sample-plugin.php

Inside it has a function called:

function sp_echo_site()
{
   echo get_site_url();
}

I have a multisite inside has 3 sites: e.g. animals, fruits and people

And in a network level, I wanted to call the sp_echo_site() function.

I wanted to do the following loop, however of course it doesn't work, How can I make this work?

foreach (get_sites() as $site)
{
   $site->sp_echo_site();
}

How can i achieve the following result?:

animals
fruits
people

Is this possible? Or do I have to go to database? Or any other alternative methods?

My goal is to be able to call a plugin function per site and of course it has different result based on the site data.

e.g.

I have a plugin called: sample-plugin.php

Inside it has a function called:

function sp_echo_site()
{
   echo get_site_url();
}

I have a multisite inside has 3 sites: e.g. animals, fruits and people

And in a network level, I wanted to call the sp_echo_site() function.

I wanted to do the following loop, however of course it doesn't work, How can I make this work?

foreach (get_sites() as $site)
{
   $site->sp_echo_site();
}

How can i achieve the following result?:

animals
fruits
people

Is this possible? Or do I have to go to database? Or any other alternative methods?

• php
• plugin-development
• functions
• multisite

Share Improve this question edited Feb 18, 2019 at 6:31 Krzysiek Dróżdż 25.6k99 gold badges5353 silver badges7474 bronze badges asked Feb 18, 2019 at 5:17 MarkMark 1322 bronze badges

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3 Answers 3

Sorted by: Reset to default 2

You're almost there...

If you have this in your plugin:

function sp_echo_site() {
   echo get_site_url();
}

Then you call this function as this:

sp_echo_site();

And this line will run this function in the context of current site.

So you'll have to do something like this:

if ( function_exists( 'get_sites' ) ) {
    foreach ( get_sites() as $site ) {
        switch_to_blog( $site->blog_id );

        sp_echo_site();

        restore_current_blog();
    }
}

Mark, to achieve the following result, you have to change your foreach loop. Try this code:

foreach (get_sites() as $site) {
  echo $site->__get('siteurl');
}

EDIT: Wordpress reference

Yes, that's an option OR you can do this exmaple/?trigger_my_func sub1.exmaple/?trigger_my_func or exmaple/sub1/?trigger_my_func by triggering a method when accessing a subsite within a network it should run in the context of that site and output site specific information.