How to use core_upgrade_preamble action in WordPress

core_upgrade_preamble action

Fires after the core, plugin, and theme update tables.

To use the core_upgrade_preamble action, first you have to register it using add_action. You can write this code into the functions.php of your activated theme or in a custom WordPress Plugin.

We at WePlugins always prefer to create a custom WordPress Plugin while using hooks so nothing breaks when you update your WordPress Theme in the future.

In the below live example, we have defined a function weplugins_execute_on_core_upgrade_preamble_event and we registered it using add_action. The first parameter core_upgrade_preamble is the name of the hook, the second parameter weplugins_execute_on_core_upgrade_preamble_event is the name of the function which needs to be called, the third parameter is the priority of calling the hook if the same hook is used multiple times, and the last parameter is the number of arguments (if any) to be passed in the registered function.

Sometimes, you have to remove a registered hook so you can use remove_action to remove the core_upgrade_preamble action.

Parameters

• No parameters

Live Example

Example 1: Basic Hook Registration

Below is an example of how you can use this hook.

    function weplugins_execute_on_core_upgrade_preamble_event(){
        // You can write code here to be executed when this action occurs in WordPress website according to your requirements.
    }
    // add the action
    add_action( "core_upgrade_preamble", "weplugins_execute_on_core_upgrade_preamble_event");
    

Example 2: Removing a Hook Callback

To remove a hook callback, use the example below.

    remove_action( "core_upgrade_preamble", "weplugins_execute_on_core_upgrade_preamble_event");
    

Please make sure to provide the same callback function name, priority, and number of arguments while removing the hook callback.

Example 3: Conditional Hook Execution

Here’s an example of how to conditionally execute code using this hook.

    function weplugins_conditional_core_upgrade_preamble_event(){
        if ( current_user_can( 'manage_options' ) ) {
            // Code for users with 'manage_options' capability
        }
    }
    add_action( "core_upgrade_preamble", "weplugins_conditional_core_upgrade_preamble_event");
    

Contact Us

If you’re having any trouble using this hook, please contact our WordPress Development Team and we’d be happy to assist you.