要在主题文件函数中创建短代码，请编写代码。php

 function my_shortcode_fun() {
        $output = $class = \'\';
        ob_start(); 
            enter code here....
        $output = ob_get_contents();
        ob_end_clean();
        return $output;
    }
    add_shortcode(\'my-shortcode\', \'my_shortcode_fun\');