首先，我将在这里添加3个资源，用于学习有关短代码的大部分内容：

Official WP Docs

A good article

Another article that I wrote

我的意思是你不echo 在您的快捷码中输入内容，但您将其返回，以便WordPress只能在需要的地方打印它。

对于特定的短代码，代码应如下所示：

add_shortcode(\'week_menu\',\'week_menu\');
function week_menu() {

    $week = date("W");

    $year = date("Y");

    $page_id = 3947;

    $page_object = get_post($page_id);
    
    $html = \'\';

    $html += \'<div class="weekmanu-wrapper"><div class="weekmenu-content"><h2 class="h2wm">Menu for \'.$year.\', week \'.$week.\'.</h2></div>\';

    $html += $page_object->post_content;

    $html += \'</div>\';

    return $html;
}

另一种方法是使用ob_ functions . 这样做，您不再需要将所有内容添加到一个变量中，而是可以回显它，结果将存储在输出缓冲区中，以便在return 陈述

add_shortcode(\'week_menu\',\'week_menu\');
function week_menu() {

    $date_string = date("Y, \\w\\e\\e\\k W");

    $page_id = 3947;

    $page_object = get_post($page_id);
    
    // Here we turn on output buffering.
    // Anything that is being output ( echoed ) after this line will be 
    // caught by the buffer.
    // https://www.php.net/manual/en/function.ob-start.php
    ob_start();
    ?>
    <div class="weekmanu-wrapper">
      <div class="weekmenu-content">
        <h2 class="h2wm">Menu for <?php echo $date_string ?>.</h2>
      </div>

      <?php echo $page_object->post_content; ?>
    </div>
    <?php

    // Here we get the contents of the output buffer and clean (erase) the buffer contents.
    // After this line, echoing starts working normally again. 
    // https://www.php.net/manual/en/function.ob-get-clean.php
    return ob_get_clean();
}