Question

我正在为我正在处理的网站构建自定义站点地图，我设法应用自定义过滤器并显示正确页面的唯一方法是创建几个循环，每次检查父项是否有子项，然后相应地显示它们。这是一个相当大的网站，内容丰富。

这是我当前的循环，它绘制每个页面标题和链接：

<?php $children = get_posts( array('category' => $region_id, 'post_type' => 'page', 'numberposts' => 100, 'post_parent' => $pg->ID, 'post_status' => 'publish', 'orderby' => 'menu_order', 'order' => 'ASC') ); ?>

<?php if ($children) : ?>
    <ul class="children">
        <?php foreach ($children as $child) : ?>
            <?php $subkids = get_posts( array('category' => $region_id, 'post_type' => 'page', 'numberposts' => 100, 'post_parent' => $child->ID, 'post_status' => 'publish', 'orderby' => 'menu_order', 'order' => 'ASC') ); ?>
            <li>
                <a href="<?php echo get_permalink($child->ID); ?>" title="<?php echo $child->post_title;?>"><?php echo $child->post_title;?></a>
                <?php if( count( $subkids ) != 0 ) : ?>
                    <ul class="children">
                        <?php foreach($subkids as $kid) : ?>
                            <?php $subkids2 = get_posts( array('category' => $region_id, 'post_type' => 'page', 'numberposts' => 100, 'post_parent' => $kid->ID, 'post_status' => 'publish', 'orderby' => 'menu_order', 'order' => 'ASC') ); ?>
                            <li>
                                <a href="<?php echo get_permalink($kid->ID); ?>" title="<?php echo $kid->post_title; ?>"><?php echo $kid->post_title; ?></a>
                                <?php if( count( $subkids2 ) != 0 ) : ?>
                                    <ul class="children">
                                        <?php foreach($subkids2 as $kid2) : ?>
                                            <?php $subkids3 = get_posts( array('category' => $region_id, 'post_type' => 'page', 'numberposts' => 100, 'post_parent' => $kid2->ID, 'post_status' => 'publish', 'orderby' => 'menu_order', 'order' => 'ASC') ); ?>
                                            <li>
                                                <a href="<?php echo get_permalink($kid2->ID); ?>" title="<?php echo $kid2->post_title; ?>"><?php echo $kid2->post_title; ?></a>
                                                <?php if( count( $subkids3 ) != 0 ) : ?>
                                                    <ul class="children">
                                                        <?php foreach($subkids3 as $kid3) : ?>
                                                            <li>
                                                                <a href="<?php echo get_permalink($kid3->ID); ?>" title="<?php echo $kid3->post_title; ?>"><?php echo $kid3->post_title; ?></a>
                                                            </li>
                                                        <?php endforeach; ?>
                                                    </ul>
                                                <?php endif; //for if forth level children exist ($subkid3) ?>
                                            </li>
                                        <?php endforeach; ?>
                                    </ul>
                                <?php endif; //for if third level children exist ($subkid2) ?>
                            </li>
                        <?php endforeach; ?>
                    </ul>
                <?php endif; //for if second level children exist ($subkids) ?>
            </li>
        <?php endforeach; ?>
    </ul>
<?php endif; ?>

编辑：我从代码中删除了自定义元过滤器以减少空间，但这里是我在每个循环中应用的示例：

<?php $meta = get_post_meta($child -> ID, 'wpcf-visible-in-sitemap'); ?>
<?php if($meta[0] != 1) : // If page should not be displayed, hide it ?>
    <li><a href="<?php echo get_permalink($child -> ID); ?>" alt="<?php echo get_the_title($child -> ID); ?>"><?php echo get_the_title($child -> ID); ?></a></li>
<?php endif; ?>

这真的很讨厌，有没有更有效的编码方式？

Answer 1

递归函数解决了我的问题，我能够将代码减少到以下内容：

function check_for_children( $region_id, $children ) {
    if ( count($children) > 0 ) {
        echo '<ul class="children">';
        foreach($children as $child) {
            echo '<li>' . $child -> post_title . '</li>';
            $children = get_posts( array('category' => $region_id, 'post_type' => 'page', 'numberposts' => 100, 'post_parent' => $child -> ID, 'post_status' => 'publish', 'orderby' => 'menu_order', 'order' => 'ASC') );
            check_for_children($region_id, $children);
        }
        echo '</ul>';
    } else {
        return;
    }
}

该函数调用自身直到不再有子节点，此时它会移动到下一组。

在构建WordPress自定义站点地图时避免循环中的循环

1 个答案: