Action

One of the most important part of plugin development in WordPress is Actions.

You can add actions in init & onAdmin methods.

addAction method

addAction method is defined as so:

public function addAction(string $hook, array $callback, int $priority = 10, int $accepted_args = 1)
    {
        $this->validateCallback($callback);
        $this->actions[] = $this->getHook($hook, $callback, $priority, $accepted_args);
    }

You should use this method like so:

$this->addAction();

addAction parameters

$hook & $priority & $accepted_args does not need any explanation.

But for callbacks you need to create a controller first.

You can create your controllers in ./app/Controllers. controller is a class that you write your logic in it.

after creating you class in given folder you should add it under this namespace: namespace Realtyna\YOUR-PLUGIN-NAMESPACE\Controllers;

After creating your controller class for example UserController, create a public method in it, for example: index

now you can register your action like so:

$this->addAction('example-hookname', [UserController::class, 'index'], 5, 1);

You can also create sub folders for your controllers but be careful about their namespaces. for example, you create your controller like so:

./app/Controllers/Admin/Pages/ExampleController.php

so your namespace will be: namespace Realtyna\YOUR-PLUGIN-NAMESPACE\Controllers\Admin\Pages;