How to use auto_core_update_send_email filter in WordPress

Let’s dive into the fascinating world of WordPress hooks! Today, we’ll explore the auto_core_update_send_email filter. This nifty filter lets you decide whether or not to send an email after an automatic background core update. It’s a powerful tool, and once you get the hang of it, you’ll wonder how you ever managed without it!

To use the auto_core_update_send_email filter, you’ll first need to register it using add_filter. You can add this code to the functions.php file of your active theme or, even better, create a custom WordPress Plugin. This way, nothing breaks when you update your WordPress Theme in the future. At WePlugins, we always recommend the plugin route for added safety.

Here’s a look at the parameters you’ll be working with:

• $send: (bool) Whether to send the email. Default true.
• $type: (string) The type of email to send. Can be one of ‘success’, ‘fail’, ‘critical’.
• $core_update: (object) The update offer that was attempted.
• $result: (mixed) The result for the core update. Can be WP_Error.

Example 1: Basic Usage

Here’s a simple example to get you started with using this hook.

    function weplugins_modify_auto_core_update_send_email($send, $type, $core_update, $result) { 
        // Update the $send variable according to your website requirements and return this variable.
        return $send; 
    }
    // Add the filter
    add_filter( "auto_core_update_send_email", "weplugins_modify_auto_core_update_send_email", 10, 4 );
    

Example 2: Conditional Email Sending

Let’s see how you can modify the $send variable conditionally based on your requirements.

    function weplugins_conditional_email_send($send, $type, $core_update, $result) {
        if ($type === 'success') {
            // Maybe don't send an email for successful updates
            return false;
        }
        return $send;
    }
    // Add the filter
    add_filter( "auto_core_update_send_email", "weplugins_conditional_email_send", 10, 4 );
    

Example 3: Removing the Hook

If you need to remove a registered hook, you can use remove_filter as shown below.

    remove_filter( "auto_core_update_send_email", "weplugins_modify_auto_core_update_send_email", 10, 4 );
    

Remember to provide the same callback function name, priority, and number of arguments when removing the hook callback.