Php WordPress'；圆形'；自定义帖子类型的类别内分页

我试图在WordPress中构建一个帖子滑块，显示特定类别的自定义帖子，并在帖子上添加分页。我希望此分页是循环的，以便最后一篇文章链接到第一篇文章，反之亦然

它几乎工作得很完美，但出于某种原因，最近的帖子“上一篇”链接是链接到它自己，而不是上一篇帖子（“下一篇”链接正确地指向该类别中最早的帖子），对此我感到困惑

如果我用

<?php next_post_link('%link', '%title', TRUE); ?>
<?php previous_post_link('%link', '%title', TRUE); ?>

它工作正常，但不是循环的。但是如果我添加if语句来显示第一个/最后一个链接，如果没有下一个/上一个项目，那么最近的帖子就不会认为它有上一个帖子要链接，即使它有

这是我的完整代码：

<?php $args = array(
            'post_type' => 'pub',
            'post_status' => 'publish',
            'posts_per_page' => 99,
            'category__in' => 17,
            'order' => 'DESC',
        );
        $arr_posts = new WP_Query( $args ); 
            $post = $posts[0]; $c=0;  ?>
                    <?php 
                 if ( $arr_posts->have_posts() ) : 
        ?>
<section class="above-fold-splash">
<div class="mySlider">
    <?php
while ( $arr_posts->have_posts() ) : 
    $arr_posts->the_post();
    $image = get_field('photo');
    $image_size_big = 'full';
$image_size_small = 'large-square';
$image_array_big = wp_get_attachment_image_src($image, $image_size_big);
$image_array_small = wp_get_attachment_image_src($image, $image_size_small);
$image_url = $image_array_big[0];
$image_url_small = $image_array_small[0];
    $logo = get_field('logo');
    if( $logo ):
            
        // Image variables.
        $logourl = $logo['url'];
        $logotitle = $logo['title'];
        $logoalt = $logo['alt'];

    endif;
    $website = get_field('website_address');
    ?>
    <div class="slide">
<div class="background-image desktop" style="background-image: url(<?php echo $image_url; ?>);"></div>
<div class="background-image mobile" style="background-image: url(<?php echo $image_url_small; ?>);"></div>
<div class="overlay"></div>

<div class="row">
    <div class="col full">
        <div class="image" data-aos="fade" data-aos-offset="0" data-aos-duration="2000" data-aos-delay="1000"><?php echo wp_get_attachment_image( $logo ); ?></div>
        <div data-aos="fade-up" data-aos-offset="0" data-aos-duration="2000" data-aos-delay="1000" class="buttons">
        <a class="button icon-none left" href="<?php echo $website; ?>"><span class="icon left"><span class="nothover"></span><span class="hover"></span></span><span class="text">Visit Website</span><span class="icon right"><span class="nothover"></span><span class="hover"></span></span></a>
        <a class="button icon-none right" href="/our-pubs"><span class="icon left"><span class="nothover"></span><span class="hover"></span></span><span class="text">See All Pubs</span><span class="icon right"><span class="nothover"></span><span class="hover"></span></span></a>
        </div>
    </div>
</div>
<div class="slider-pagination">
    <?php
$next_post = get_next_post(true);
if ( ! empty( $next_post ) ): ?>
<a href="<?php echo get_permalink( $next_post->ID ); ?>">
    <?php echo apply_filters( 'the_title', $next_post->post_title ); ?>
</a>
<?php else: 
$args = array( 
    'post_type' => 'pub',
    'post_status' => 'publish',
    'posts_per_page' => 1,
    'category__in' => 17,
    'order' => 'ASC',
 );
        $last = new WP_Query($args); $last->the_post();
        echo '<a href="' . get_permalink() . '">' . get_the_title() . '</a>';
        wp_reset_postdata();
 endif; 
$prev_post = get_previous_post(true);
if ( ! empty( $prev_post ) ): ?>
<a href="<?php echo get_permalink( $prev_post->ID ); ?>">
    <?php echo apply_filters( 'the_title', $prev_post->post_title ); ?>
</a>
<?php else:    
$args = array( 
    'post_type' => 'pub',
    'post_status' => 'publish',
    'posts_per_page' => 1,
    'category__in' => 17,
    'order' => 'DESC',
 );
$first = new WP_Query($args); $first->the_post();
echo '<a href="' . get_permalink() . '">' . get_the_title() . '</a>';
wp_reset_postdata();
 endif; ?>
</div>
</div>
<?php endwhile; else : endif;  ?>
</div>
</section>
<?php wp_reset_postdata(); ?>

真是个有趣的问题

根据你的评论。在
single.php
/
single.php
上下文中

<?php
if ( have_posts() ) :
while ( have_posts() ) : the_post();

  the_title( '<h1>', '</h1>' );
  the_content();

endwhile;

  if( ! empty( get_previous_post() ) ):
    echo '<a href="' . get_the_permalink( get_previous_post()->ID ) . '"> << </a>';
  else:
    echo '<a href="' . get_the_permalink( get_posts ("post_type=" . get_query_var( 'post_type' ) . "&numberposts=1&order=DESC")[0]->ID ) . '"> << </a>';
  endif;
  if( ! empty( get_next_post() ) ):
    echo '<a href="' . get_the_permalink( get_next_post()->ID ) . '"> >> </a>';
  else:
    echo '<a href="' . get_the_permalink( get_posts( "post_type=" . get_query_var( 'post_type' ) . "&numberposts=1&order=ASC")[0]->ID ) . '"> >> </a>';
  endif;

endif; ?>

基于amarinediary的代码，我做了一些细微的更改，包括类别过滤器，并使其正常工作！完整代码如下：

<?php           $args = array(
            'post_type' => 'pub',
            'post_status' => 'publish',
            'posts_per_page' => 99,
            'category__in' => 17,
            'order' => 'DESC',          
        );
        $arr_posts = new WP_Query( $args ); 
            $post = $posts[0]; $c=0;  ?>
                    <?php 
                 if ( $arr_posts->have_posts() ) : 
        ?>

<section class="above-fold-splash">
    <div class="mySlider">
        <?php
        while ( $arr_posts->have_posts() ) : 
            $arr_posts->the_post();
            $image = get_field('photo');
            $image_size_big = 'full';
            $image_size_small = 'large-square';
            $image_array_big = wp_get_attachment_image_src($image, $image_size_big);
            $image_array_small = wp_get_attachment_image_src($image, $image_size_small);
            $image_url = $image_array_big[0];
            $image_url_small = $image_array_small[0];
            $logo = get_field('logo');
                if( $logo ):
                        
                    // Image variables.
                    $logourl = $logo['url'];
                    $logotitle = $logo['title'];
                    $logoalt = $logo['alt'];

                endif;
            $website = get_field('website_address');
        ?>
<div class="slide">
<div class="background-image desktop" style="background-image: url(<?php echo $image_url; ?>);"></div>
<div class="background-image mobile" style="background-image: url(<?php echo $image_url_small; ?>);"></div>
<div class="overlay"></div>
<div class="row">
    <div class="col full">
        <div class="image" data-aos="fade" data-aos-offset="0" data-aos-duration="2000" data-aos-delay="1000"><?php echo wp_get_attachment_image( $logo ); ?></div>
        <div data-aos="fade-up" data-aos-offset="0" data-aos-duration="2000" data-aos-delay="1000" class="buttons">
        <a class="button icon-none left" href="<?php echo $website; ?>"><span class="icon left"><span class="nothover"></span><span class="hover"></span></span><span class="text">Visit Website</span><span class="icon right"><span class="nothover"></span><span class="hover"></span></span></a>
        <a class="button icon-none right" href="/our-pubs"><span class="icon left"><span class="nothover"></span><span class="hover"></span></span><span class="text">See All Pubs</span><span class="icon right"><span class="nothover"></span><span class="hover"></span></span></a>
        </div>
    </div>
</div>
<div class="slider-pagination">
    <div class="prev">
        <?php if( ! empty( get_next_post(true) ) ):
        echo '<a href="' . get_the_permalink( get_next_post(true)->ID ) . '">' . get_the_title( get_next_post(true)->ID ) . '</a>';
        else:
        echo '<a href="' . get_the_permalink( get_posts( "post_type=pub&numberposts=1&order=ASC&cat=17")[0]->ID ) . '">' . get_the_title( get_posts( "post_type=pub&numberposts=1&order=ASC&cat=17")[0]->ID ) . '</a>';
        endif; ?>
    </div>
    <div class="next">
        <?php   if( ! empty( get_previous_post(true) ) ):
        echo '<a href="' . get_the_permalink( get_previous_post(true)->ID ) . '">' . get_the_title( get_previous_post(true)->ID ) . '</a>';
        else:
        echo '<a href="' . get_the_permalink( get_posts ("post_type=pub&numberposts=1&order=DESC&cat=17")[0]->ID ) . '">' . get_the_title( get_posts( "post_type=pub&numberposts=1&order=DESC&cat=17")[0]->ID ) . '</a>';
        endif; ?>
    </div>
</div>
<?php endwhile; ?>
</div> <!-- end slide-->
</div> <!-- end MySlider-->
</section>
<?php  endif;  wp_reset_postdata(); ?>


你好，谢谢你这么说，但我认为我们的讨论是有分歧的——看起来你写的代码是用于在文章页面之间分页的，对吗？而我说的是对单个帖子本身的分页——next_post_link（）而不是next_posts_link（）。除非我误解了你的评论？这是一样的，你可以修改它。但是它没有链接到帖子本身，是吗？它看起来像是链接到该帖子类型的搜索结果的第一页（或最后一页）-我正在尝试获取实际帖子的链接（和标题）。好的，明白你的意思了。我在答案中添加了一个编辑。啊，太棒了，谢谢，这让我达到了我需要的位置！：-）