Plugin.php

<?php namespace Fes\Weather;

use System\Classes\PluginBase;

class Plugin extends PluginBase
{

    public function registerComponents()
    {
        return [
            '\Fes\Weather\Components\Weather' => 'weather'
        ];
    }

    public function registerSettings()
    {
        return [
            'settings' => [
                'label'       => 'fes.weather::lang.plugin.name',
                'description' => 'fes.weather::lang.plugin.description',
                'category'    => 'Plugins',
                'icon'        => 'icon-sun-o',
                'class'       => 'Fes\Weather\Models\Settings',
                'order'       => 100
            ]
        ];
    }

    public function registerMarkupTags()
    {
        return [
            'filters' => [
                'cast_to_array' => [$this, 'castToArray']
            ]
        ];
    }

    public function castToArray($stdClassObject)
    {
        $response = array();
        foreach ($stdClassObject as $key => $value) {
            $response[] = array($key, $value);
        }
        return $response;
    }
}