service provider

simple-service-provider.php

<?php

interface PluginServiceProvider
{
    public function register(Plugin $plugin): void;
}

class Plugin
{
    protected $methods = [];

    public function addPlugin(PluginServiceProvider $provider)
    {
        $provider->register($this);
        return $this;
    }
    
    public function addMethod($name, $call)
    {
        $this->methods[$name] = $call;
    }
    
    public function __call($method, $params = [])
    {
        if (!isset($this->methods[$method])) {
            throw new \Exception('method doesnt exist');
        }
        
        return call_user_func($this->methods[$method], ...$params);
    }
}

class SomeServiceProvider implements PluginServiceProvider
{
    public function register(Plugin $plugin): void
    {
        $plugin->addMethod('do', [$this, 'doAAA']);
    }   
    
    public function doAAA() {
        echo "AAAA";
    }
}

$plugin = new Plugin();
$plugin->addPlugin(new SomeServiceProvider());

$plugin->do();