Base for WP_Widget

WP_Widget.php

<?php
class My_Widget extends WP_Widget {
	public function __construct() {
		$widget_ops = array(
			'classname' => 'my-widget',
			'description' => __( 'My Widget description', 'textdomain' ),
		);
		$this->WP_Widget( 'My_Widget', __( 'My Widget title', 'textdomain' ), $widget_ops );
	}

	public function widget( $args, $instance ) {

		extract( $args, EXTR_SKIP );
			
		$title = empty( $instance['title'] ) ? false : apply_filters( 'widget_title', $instance['title'] );
		$text  = empty( $instance['text'] ) ? false : $instance['text'];

		echo $before_widget;
			
		if ( $title ) {
			echo $before_title . $title . $after_title;
		}
		if ( $text ) {
			echo $before_text . wpautop( $text ) . $after_text;
		}

		echo $after_widget;

	}

	public function form( $instance ) {

		$instance = wp_parse_args(
			(array) $instance, 
			array(
				'title' => '',
				'text' => '',
			)
		);

		$title = $instance['title'];
		$text  = $instance['text'];
	?>
	<p>
		<label for="<?php echo $this->get_field_id( 'title' ); ?>"><?php _e( 'Title' ); ?>
		<input class="widefat" id="<?php echo $this->get_field_id( 'title' ); ?>"
			   name="<?php echo $this->get_field_name( 'title' ); ?>" type="text"
			   value="<?php echo attribute_escape( $title ); ?>" />
	  </label>
	</p>
	<p>
		<label for="<?php echo $this->get_field_id( 'text' ); ?>"><?php _e( 'Text' ); ?>
			<textarea class="widefat" id="<?php echo $this->get_field_id( 'text' ); ?>" name="<?php echo $this->get_field_name( 'text' ); ?>"><?php echo  attribute_escape( $text ); ?></textarea>
		</label>
	</p>
	<?php 
	
	}

	public function update( $new_instance, $old_instance ) {
	
		$instance = $old_instance;
		foreach ( $new_instance as $key => $value ) {
			switch ( $key ) {
				default:
					$instance[ $key ] = $new_instance[ $key ];
				break;
			}
		}

		return $instance;
	}
}

Hi, $this->WP_Widget() is deprecated so use parent::__construct() instead of $this->WP_Widget().