WordPress Customizer, Selective Refresh and Partials for Multiple Settings

There are several good references about how to set up the Customizer to avoid refreshing the entire page with each change. There’s one here, and there’s some deeper explanation here. What’s not described much is how to map several settings to a single area of the page (called a Partial).

This tutorial will go into updating Partials that use several settings. I assume you have already done the other tutorials.
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/etc/resolv.conf, resolvconf, NetworkManager (and systemd-resolved?) Not Working

I ran some updates, and the name service stopped resolving. My LAN has a local nameserver to resolve domain names for virtual machines.

It turns out the /etc/resolv.conf file was overwritten, and a program called resolvconf had taken it over. resolvconf centralizes updating the resolv.conf file from several different programs that might want to change the file, like NetworkManager, ifup, ifdown, and dhclient.

There are a couple fixes. The one I chose was to replace resolv.conf.
Continue reading /etc/resolv.conf, resolvconf, NetworkManager (and systemd-resolved?) Not Working

WordPress Plugin Update and Install Functions

On the page where they explain how to create tables for your plugin, there’s a link to the register_activation_hook function, which is run when the plugin is activated. However, right in the first section, it says:

Note: Don’t use activation hooks (especially for multisite). Do this instead:

It’s far better to use an upgrade routine fired on admin_init, and handle that per-site, basing it on a stored option.

That links to another page, which repeats the information, but doesn’t tell you how to do this. Here’s one way. Continue reading WordPress Plugin Update and Install Functions