如何格式化 PHP 中的长回显表达式？

Question

我正在 PHP 中编写我的函数以列出 post 个类别（只看代码风格，而不是逻辑）：

function list_categories() {
    // $html = '';

    echo '<div class="post-categories post-items__categories">';
    echo '<span class="post-categories__title">Categories:</span>';

    echo '<ul class="post-categories__list">';
    echo '<li class="post-categories__item"><a class="post-categories__link">All categories</a></li>';

    $categories = get_categories([
        'taxonomy'     => 'category',
        'type'         => 'post',
        'orderby'      => 'name',
        'order'        => 'DESC',
        'hierarchical' => false,
    ]);

    foreach ($categories as $category) {
        $cat_class = ($category->term_id == get_queried_object_id()) ? 'active' : '';

        echo '<li class="post-categories__item">
                  <a class="post-categories__link" href="'.get_category_link($category->term_id).'">'.
                     $category->name.
                 '</a>
              </li>';
    }

    echo '</ul></div>';
}

而且我希望我的标签回显表达式更具可读性，而不仅仅是像这里这样的一行：

echo '<li class="post-categories__item"><a class="post-categories__link">All categories</a></li>';

我在 foreach 循环中使用了新行，但它仍然很难看。我发现了 heredoc 语法，但我无法调用其中的函数。你怎么写这种东西？实在不想写成一行

Answer 1

如果你只需要回显 HTML 为什么不跳出 PHP，然后再返回

function list_categories() {
    // $html = '';

    echo '<div class="post-categories post-items__categories">';
    echo '<span class="post-categories__title">Categories:</span>';

    echo '<ul class="post-categories__list">';
    echo '<li class="post-categories__item"><a class="post-categories__link">All categories</a></li>';

    $categories = get_categories([....

变成...

        function list_categories() {
            // $html = ''; 
    
    //break out of php
    ?> 
        
            <div class="post-categories post-items__categories">
            <span class="post-categories__title">Categories:</span>
        
           <ul class="post-categories__list">
            <li class="post-categories__item"><a class="post-categories__link">All categories</a></li>
        
   <!--carry on with php-->
    <?php 
        
            $categories = get_categories([....

如果您需要在 html 代码中间调用变量，您可以这样..

<?php $demo = "hello"; ?>
<span><?php echo $demo; ?> World</span>

HTML 在变量中...

<?php $html = ' ?>
<!--HTML HERE-->
<?php '; ?>

如何格式化 PHP 中的长回显表达式？

How to format long echo expressions in PHP?

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coding-style