我正试着从2015年开始制作我自己的孩子主题。一切看起来和功能都很好，但当我打开调试时，我可以看到一个PHP错误：

Undefined variable: parent_style

下面是函数的内容。php文件。

<?php /*

  This file is part of a child theme called spch.
  Functions in this file will be loaded before the parent theme\'s functions.
  For more information, please read https://codex.wordpress.org/Child_Themes.

*/

// this code loads the parent\'s stylesheet (leave it in place unless you know what you\'re doing)

function theme_enqueue_styles() {
    wp_enqueue_style(\'parent-style\', get_template_directory_uri() . \'/style.css\');
    wp_enqueue_style(\'child-style\', get_stylesheet_directory_uri() . \'/style.css\', array($parent_style));
}
add_action(\'wp_enqueue_scripts\', \'theme_enqueue_styles\');

/*  Add your own functions below this line.