Error

36            <h1 class="article-header-title"><?= $title ?></h1>
37
38            <!-- 文章分类 -->
39            <?php if (!empty($categories)): ?>
40            <div class="article-header-categories">
41                <?php foreach ($categories as $category): ?>
42                <a href="<?= $category['url'] ?>" class="article-header-category">
43                    <?= $category['name'] ?>
44                </a>
45                <?php endforeach; ?>
46            </div>
47            <?php endif; ?>
48