我已经创建了一个php while语句,它在特定的布局中显示来自wordpress的8篇文章。现在我想继续运行这个循环,直到所有的帖子都显示出来。所以我所做的是创建一个名为posts_displayed的变量,我用它来设置post_offset,并在每次显示post时递增它。原始代码按预期工作,但当我在其周围添加额外的while语句时,不会显示任何帖子。
我已经更新了代码,这样就有一个主查询和循环,其中有四个不同的查询和循环。我现在遇到的问题是在第131行,在那里我得到了一个意外的endwhile错误。

    <?php $posts_displayed = 0; ?>

<?php
   $main_query = new WP_Query( array(
     'category_name' => 'Travel',
   ));
?>

<?php if ( $main_query->have_posts() ) : ?>
  <?php while ( $posts_displayed < ($main_query->post_count)  ) ?>

<?php
   $first_query = new WP_Query( array(
     'category_name' => 'Travel',
      'posts_per_page' => 2,
      'offset' => $posts_displayed,
   ));
?>

<div class="row row__padding--bottom homepage__row--one">

<?php if ( $first_query->have_posts() ) : ?>
  <?php while ( $first_query->have_posts() ) : $first_query->the_post(); ?>

    <div class="col-sm-12 col-md-6">
        <div class="journal__latest" style="background: url(<?php echo get_the_post_thumbnail_url( $post_id, 'large' ); ?>) !important; background-size: cover !important; background-position: center center !important; background-repeat: no-repeat !important;">

        </div>
        <div class="post__info--container">
          <a href="<?php echo esc_url( get_permalink()); ?>"><h4><?php the_title(); ?></h4></a>
        </div>
   </div>

  <?php endwhile; ?>
  <?php wp_reset_postdata(); ?>

<?php endif; ?>

</div>

<?php
   $second_query = new WP_Query( array(
     'category_name' => 'Travel',
      'posts_per_page' => 3,
       'offset' => posts_displayed,
   ));
?>

<div class="row row__padding--bottom">

<?php if ( $second_query->have_posts() ) : ?>
  <?php while ( $second_query->have_posts() ) : $second_query->the_post(); ?>


    <div class="col-12 col-md-4">
        <div class="portfolio__featured" style="background: url(<?php echo get_the_post_thumbnail_url( $post_id, 'large' ); ?>) !important; !important; background-size: cover !important; background-position: center center !important; background-repeat: no-repeat !important;">

        </div>
        <div class="post__info--container">
          <a href="<?php echo esc_url( get_permalink()); ?>"><h4><?php the_title(); ?></h4></a>
       </div>
    </div>

  <?php endwhile; ?>
  <?php wp_reset_postdata(); ?>

<?php endif; ?>

</div>

<?php
   // the query
   $third_query = new WP_Query( array(
     'category_name' => 'Travel',
      'posts_per_page' => 1,
     'offset' => posts_displayed,
   ));
?>

<div class="row row__padding--bottom">

<?php if ( $third_query->have_posts() ) : ?>
  <?php while ( $third_query->have_posts() ) : $third_query->the_post(); ?>

    <div class="col-12">
        <div class="journal__featured" style="background: url(<?php echo get_the_post_thumbnail_url( $post_id, 'large' ); ?>) !important; !important; background-size: cover !important; background-position: center center !important; background-repeat: no-repeat !important;">

        </div>
        <div class="post__info--container">
            <a href="<?php echo esc_url( get_permalink()); ?>"><h4><?php the_title(); ?></h4></a>
        </div>
    </div>

  <?php endwhile; ?>
  <?php wp_reset_postdata(); ?>

<?php endif; ?>

</div>

<?php
   // the query
   $fourth_query = new WP_Query( array(
     'category_name' => 'Travel',
      'posts_per_page' => 2,
     'offset' => posts_displayed,
   ));
?>

<div class="row row__padding--bottom">

<?php if ( $fourth_query->have_posts() ) : ?>
  <?php while ( $fourth_query->have_posts() ) : $fourth_query->the_post(); ?>

    <div class="col-sm-12 col-md-6">
        <div class="journal__featured" style="background: url(<?php echo get_the_post_thumbnail_url( $post_id, 'large' ); ?>) !important; !important; background-size: cover !important; background-position: center center !important; background-repeat: no-repeat !important;">

        </div>
        <div class="post__info--container">
            <a href="<?php echo esc_url( get_permalink()); ?>"><h4><?php the_title(); ?></h4></a>
        </div>
    </div>

  <?php endwhile; ?>
  <?php wp_reset_postdata(); ?>

<?php endif; ?>

</div>

<?php endwhile; ?>

<?php else : ?>
  <p><?php __('No News'); ?></p>
<?php endif; ?>

最佳答案

我发现你的代码有一些问题。首先在你的第一个if

if ( $the_query->have_posts() )

$查询仍然未定义,因此它没有post,您将$查询定义为wp_query类的一个实例,下面有几行代码。
其次,有条件地调用wp_reset_postdata(),这意味着如果查询没有posts post数据,则不会重置。
当然,你查询数据库的次数太多了,我不明白你为什么需要它。
我做了一些快速修正(注意下面的代码没有经过测试,我只是应用了我能想到的快速解决方案)
<?php
$the_query = new WP_Query(
    array(
        'category_name'  => 'Travel',
        'posts_per_page' => 64,
    )
);
?>
<div class="row row__padding--bottom">
    <?php
    if ( $the_query->have_posts() ) :
        $i         = 0;
        $class_map = [
            0 => 'col-md-6',
            1 => 'col-md-6',
            6 => 'col-md-6',
            7 => 'col-md-6',
            2 => 'col-md-4',
            3 => 'col-md-4',
            4 => 'col-md-4',
            5 => 'col-md-12',
        ];
        while ( $the_query->have_posts() ) :
            $the_query->the_post();
            ?>
            <div class="col-sm-12 <?php echo esc_attr( $class_map[ $i % 8 ] ); ?>">
                <div class="journal__featured" style="background: url(<?php the_post_thumbnail_url( 'large' ); ?>) !important; !important; background-size: cover !important; background-position: center center !important; background-repeat: no-repeat !important;">
                </div>
                <div class="post__info--container">
                    <a href="<?php the_permalink(); ?>"><h4><?php the_title(); ?></h4></a>
                </div>
            </div>
            <?php
            if ( 1 === ($i % 8) || 4 === ($i % 8) || 5 === ($i % 8) ) {
                echo '</div><div class="row row__padding--bottom">';
            }
            $i++;
        endwhile;
    else :
        echo '<p>' . esc_html( __( 'No News' ) ) . '</p>';
    endif;
    wp_reset_postdata();
    ?>
</div>
<?php

希望对你有用!
干杯!

关于php - 如何在PHP中循环显示while语句的while语句?,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/57628997/

10-10 10:56