# 基本的なウィジェット

## ウィジェットとは

## 一番簡単なウィジェット

```php
class My_Widget extends WP_Widget {

    public function __construct() {
        parent::__construct(
            'my_widget', // Base ID
            __('My Widget', 'text_domain'), // Name
            array( 'description' => __( 'A my widget', 'text_domain' ), ) // Args
        );
    }

    public function widget( $args, $instance ) {
        echo 'hello world';
    }

    public function form( $instance ) { }

    public function update( $new_instance, $old_instance ) {
        return array();
    }
}

// make WordPress aware of this widget:
add_action( 'widgets_init', function(){
     register_widget( 'My_Widget' );
});
```

* `__construct`
* `widget`
* `form`
* `update`

## ウィジェットフィールドの追加

バックエンドにフォームフィールドを追加し、フロントエンドのそのフィールドにアクセスする

## `the_widget`

サイドバーなしでウィジェットを表示させるには

```php
the_widget( $widget, $instance, $args );
```

これを行う必要があるとのなら、やり方を再考すべきでしょう。


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