Here is a typical code for updating versions:
if( $db_version < {your desired version} ) {
// previous updates and such
$db_version = $new_version; //put that in the database
}
if( $db_version < $current_version ) {
create $options array
foreach( $option as $o ) {
if( get_option( $o['old_name'] ) ) {
update_option( $o['new_name'], get_option( $o['old_name'] ) );
delete_option( $o['old_name'] ); //clean up behind yourself
}
}
and then update your database version again
}
I reviewed the code of your plugin briefly (about 2hrs) and there are a few suggestions I would make to help you manage the development of the plugin for both single and multisite version.
First, you can move all of your single and multisite functions to a separate scripts and only include the single script if not multisite and the multisite script if multisite. By doing this it will help you to better manage what part of the plugin relates to single and what part relates to multi.
Second, use the above code in the multisite script to check for old version options that were created using $wpdb->prefix and convert them to $wpdb->base_prefix.
With single site options you use add_option(), update_option() and delete_option().
With multisite global options you use add_site_option(), update_site_option() and delete_site_option()
These settings will be stored in the global wp_sitemeta table and will be valid for all blogs in the network.
Third, create a network admin page to manage these new settings.
add_action('network_admin_menu', 'add_my_netw_settings_page');
function add_my_netw_settings_page() {
add_submenu_page(
'settings.php',
'Cool Stuff',
'Cool Stuff',
'manage_network_options',
'my-netw-settings',
'your_form'
);
}
function your_form(){
$options = get_site_option('your_plugin');
?>
<form action="<?php echo admin_url('admin-post.php?action=update_my_settings'); ?>" method="post">
<?php wp_nonce_field('your_plugin_nonce'); ?>
...fields go here...
</form>
<?php
}
The save handler:
add_action('admin_post_update_my_settings', 'update_my_settings');
function update_my_settings(){
check_admin_referer('your_plugin_nonce');
if(!current_user_can('manage_network_options')) wp_die('FU');
// process your fields from $_POST here and update_site_option
wp_redirect(admin_url('network/settings.php?page=my-netw-settings'));
exit;
}
Hopefully, this will point you in the right direction.
Pat
