WordPress Widget Code

// Creates a Simple_Widget.
class Simple_Widget extends WP_Widget{
 
	// Constructor
    public function __construct(){

        $widget_options = array( 
            'description' => 'A Simple Widget with limited use.',
            'classname'  => 'simple-class',
        );
        parent::__construct('simple_widget', 'Simple Widget', $widget_options );
    }
 
	// Outputs the widget content on the front-end
	public function widget( $args, $instance ){

		extract( $args );
        $title = apply_filters( 'widget_title', $instance['title'] );
        $text = apply_filters( 'widget_text', $instance['text'] );

        echo $before_widget;
        echo (!empty( $title )) ? $before_title . $title . $after_title : '';
        echo (!empty( $text )) ? $text . $after_widget : '';
	}
 
  	// Outputs options form in the WordPress admin
    public function form( $instance ){

    	isset($instance[ 'title' ]) ? $title = $instance[ 'title' ] :  $title = __( 'Simple Title', 'xxx_domain' );
        isset($instance[ 'text' ]) ? $text = $instance[ 'text' ] : $text = __( 'Simple Text', 'xxx_domain' );
       
		<p>
		<label for="<?php echo $this->get_field_name( '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>

		<p>
		<label for="<?php echo $this->get_field_name( 'text' ); ?>"><?php _e( 'Text:' ); ?></label>
		<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>
		
    }
 
    // Saves or updates widget data. Replaces old instances with new instances.
    public function update( $new_instance, $old_instance ){

        $instance = array();
        $instance['title'] = ( !empty( $new_instance['title'] ) ) ? strip_tags( $new_instance['title'] ) : '';
 		$instance['text'] = ( !empty( $new_instance['text'] ) ) ? strip_tags( $new_instance['text'] ) : '';
        return $instance;
    }
}

// register the Simple Widget
function register_simple_widget() {
    register_widget( 'Simple_Widget' );
}
add_action( 'widgets_init', 'register_simple_widget' );