如何在 PHP 中格式化长回显表达式？

Question

我正在用 PHP 编写我的函数来列出帖子类别（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>';
}

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，但我不能在其中调用函数。 你怎么写这种东西？实在不想一行写完

Answer 1

如果你只是需要回显 HTML，为什么不跳出 PHP，然后回到它呢

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([....

如果你需要在 html 代码中间调用一个变量，你可以这样..

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

变量中的 HTML...

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