Set site/plugin options for all blogs in a network [WordPress Multisite] [WordPress]

README.md

Set options for all the blogs on a WordPress Multisite installation

functions.php

<?php

// This function does the actual work
function djm_update_blog($blog_id = null)
{
    if ($blog_id) {
        switch_to_blog($blog_id);
    }
    //================================================================================
    
    // Put the update code here
    // For example:
    $options = get_option('aioseop_options', array());
    $options['aiosp_paged_format'] = ' - Page %page%';
    update_option('aioseop_options', $options);
    
    //================================================================================
    if ($blog_id) {
        restore_current_blog();
    }
}

// This creates a page in the admin area to run this for either the current blog
// (for testing) or every blog
add_action('admin_menu', 'djm_admin_menu');

function djm_admin_menu()
{
    add_submenu_page(
        'ms-admin.php',
        'Update All Blogs',
        'Update All Blogs',
        'manage_network',
        'update-all-blogs',
        'djm_update_page'
    );
}

function djm_update_page()
{
    global $wpdb;
    
    if (!empty($_POST['update_this'])) {
        
        // Update This Blog
        djm_update_blog();
        $message = __('Blog updated.');
        
    } elseif (!empty($_POST['update_all'])) {
        
        // Update All Blogs
        $blogs = $wpdb->get_results("
            SELECT blog_id
            FROM {$wpdb->blogs}
            WHERE site_id = '{$wpdb->siteid}'
            AND archived = '0'
            AND spam = '0'
            AND deleted = '0'
        ");
        
        foreach ($blogs as $blog) {
            djm_update_blog($blog->blog_id);
        }
        
        $message = __('All blogs updated.');
        
    }
    ?>
    
    <div class="wrap">
        <h2>Update All Blogs</h2>
        
        <?php if ($message) { ?>
            <div class="updated"><p><strong><?php echo $message ?></strong></p></div>
        <?php } ?>
        
        <form action="" method="post">
            <p>Use this form to run the update script for this blog or all network blogs.</p>
            <p><input type="submit" name="update_this" class="button" value="<?php esc_attr_e('Update This Blog') ?>" /></p>
            <p><input type="submit" name="update_all" class="button" value="<?php esc_attr_e('Update All Blogs') ?>" onclick="return confirm('Are you sure you want to run the update for all blogs?');" /></p>
        </form>
    </div>
    
    <?php
}