Plugin para ocultar Adsense a usuarios registrados en Wordpress

<?php
if(!is_user_logged_in()) :
?>
	<!-- aca el codigo de adsense -->
<?php
endif;
?>

add_action('widgets_init', 'text_advanced_widget');
function text_advanced_widget() {
	register_widget('Widget_Text_advanced');
}

class Widget_Text_advanced extends WP_Widget {

	function Widget_Text_advanced() {
		$widget_ops = array('classname' => 'widget_text_advanced', 'description' => __('Arbitrary text or HTML'));
		$control_ops = array('width' => 400, 'height' => 350);
		$this->WP_Widget('text_advanced', __('Text (Avanzado)'), $widget_ops, $control_ops);
	}

	function widget( $args, $instance ) {
		extract($args);
		if($instance['onlyguests'] == 1 && is_user_logged_in())
		{
			return FALSE;
		}

		$title = apply_filters( 'widget_title', empty($instance['title']) ? '' : $instance['title'], $instance, $this->id_base);
		$text = apply_filters( 'widget_text', $instance['text'], $instance );
		echo $before_widget;
		if ( !empty( $title ) ) { echo $before_title . $title . $after_title; } ?>
			<div class="textwidget"><?php echo $instance['filter'] ? wpautop($text) : $text; ?></div>
		<?php
		echo $after_widget;
	}

	function update( $new_instance, $old_instance ) {
		$instance = $old_instance;
		$instance['title'] = strip_tags($new_instance['title']);
		if ( current_user_can('unfiltered_html') )
			$instance['text'] =  $new_instance['text'];
		else
			$instance['text'] = stripslashes( wp_filter_post_kses( addslashes($new_instance['text']) ) ); // wp_filter_post_kses() expects slashed
		$instance['filter'] = isset($new_instance['filter']);
		$instance['onlyguests'] = isset($new_instance['onlyguests']);
		return $instance;
	}

	function form( $instance ) {
		$instance = wp_parse_args( (array) $instance, array( 'title' => '', 'text' => '' ) );
		$title = strip_tags($instance['title']);
		$text = format_to_edit($instance['text']);
?>
		<p><label for="<?php echo $this->get_field_id('title'); ?>"><?php _e('Title:'); ?></label>
		<input class="widefat" id="<?php echo $this->get_field_id('title'); ?>" name="<?php echo $this->get_field_name('title'); ?>" type="text" value="<?php echo esc_attr($title); ?>" /></p>

		<textarea class="widefat" rows="16" cols="20" id="<?php echo $this->get_field_id('text'); ?>" name="<?php echo $this->get_field_name('text'); ?>"><?php echo $text; ?></textarea>

		<p><input id="<?php echo $this->get_field_id('filter'); ?>" name="<?php echo $this->get_field_name('filter'); ?>" type="checkbox" <?php checked(isset($instance['filter']) ? $instance['filter'] : 0); ?> />&nbsp;<label for="<?php echo $this->get_field_id('filter'); ?>"><?php _e('Automatically add paragraphs'); ?></label></p>
		<p><input id="<?php echo $this->get_field_id('onlyguests'); ?>" name="<?php echo $this->get_field_name('onlyguests'); ?>" type="checkbox" <?php checked(isset($instance['onlyguests']) ? $instance['onlyguests'] : 0); ?> />&nbsp;<label for="<?php echo $this->get_field_id('onlyguests'); ?>"><?php _e('Mostrar solo a invitados'); ?></label></p>
<?php
	}
}