我们在哪里添加自定义小部件？我不断收到内部错误，我试图在wp\\u content>plugins或wp\\u includes>widgets中添加该类，但我收到了一个内部错误。

该类很简单，位于“My\\u Widget.php”中：

<?php
/*
  Plugin Name: My_Widget
  Description: my widet description
  Author: Author
 */
class My_Widget extends WP_Widget {

    /**
     * Sets up the widgets name etc
     */
    public function __construct() {
        $widget_ops = array( 
            \'class_name\' => \'my_widget\',
            \'description\' => \'My Widget is awesome\',
        );
        parent::__construct( \'my_widget\', \'My Widget\', $widget_ops );
    }

    /**
     * Outputs the content of the widget
     *
     * @param array $args
     * @param array $instance
     */
    public function widget( $args, $instance ) {
        // outputs the content of the widget
    }

    /**
     * Outputs the options form on admin
     *
     * @param array $instance The widget options
     */
    public function form( $instance ) {
        // outputs the options form on admin
    }

    /**
     * Processing widget options on save
     *
     * @param array $new_instance The new options
     * @param array $old_instance The previous options
     */
    public function update( $new_instance, $old_instance ) {
        // processes widget options to be saved
    }
}

register_widget( \'My_Widget\' );