为什么我不能将自定义字段变量传递给 Wordpress 数组中的 'numberposts' 变量？

Question

我快要疯了 - 我不明白为什么这不起作用！

我有一个带有多个查询的 wordpress 模板，以显示不同的 post 类型。

我可以做到这一点没问题:

 $showfeatposts = "1";
$args = array(
'numberposts'     => $showfeatposts,
'orderby'         => 'post_date',
'order'           => 'DESC',
'post_type'       => 'post',
'cat'             => '58',
'post_status'     => 'publish',
'suppress_filters' => true 
);

它将“1”的值传递给 'numberposts' 变量。

我需要做的是将值“1”替换为从管理面板中的自定义字段传递的值，以便管理员可以输入他们想要显示的 post 的数量.

当我将代码更改为：

$showarticleposts =  the_field('articles-posts-to-show');
$args = array(
'numberposts'     => $showarticleposts,
'orderby'         => "post_date",
'order'           => 'DESC',
'post_type'       => 'post',
'cat'             => '5, -58',
'post_status'     => 'publish',
'suppress_filters' => true 
);

我得到了所有 post 的返回值，就好像输入的值是“-1”一样

我已通过在页面上显示自定义字段中的实际值来验证它是“2”。

我做错了什么？当然这应该是可能的？

供参考：Here's the page.

ETA：我也尝试过 ACF 教程中的这种方法 - 仍然无效：

$args = array(
'numberposts'     => get_field('showarticleposts'),
'orderby'         => "post_date",
'order'           => 'DESC',
'post_type'       => 'post',
'cat'             => '5, -58',
'post_status'     => 'publish',
'suppress_filters' => true

ETA2：作为对以下答案的回应——我也尝试过这个选项：

$showarticleposts =  get_field('showarticleposts');

$args = array(
'numberposts'     => $showarticleposts,
'orderby'         => "post_date",
'order'           => 'DESC',
'post_type'       => 'post',
'cat'             => '5, -58',
'post_status'     => 'publish',
'suppress_filters' => true 
);

如果我将此代码放在页面上 - 它会回显数字“2”：

<?php echo get_field('showarticleposts'); ?>

根据请求 - 这是完整的代码页面 - 我已尝试尽可能多地清理它 - 你无疑会注意到报告部分的奇怪编码，我正在从使用类型的人那里接手创建自定义字段和自定义 post 类型。但是我正在使用 ACF 自定义字段来尝试添加选择每个 post 类型中显示在主页上的数量的能力：

section id="content" role="main" class="clearfix animated">

    <?php
    /**
     * If Featured Image is uploaded set it as a background
     * and change page title color to white
    **/
    if ( has_post_thumbnail() ) {
        $page_image_url = wp_get_attachment_image_src( get_post_thumbnail_id(), 'big-size' );
        $page_bg_image = 'style="background-image:url(' . $page_image_url[0] . ');"';
        $title_with_bg = 'title-with-bg';
    } else {
        $title_with_bg = 'wrapper title-with-sep';
    } ?>

   <!--<header class="entry-header page-header">
     <div class="page-title <?php echo isset( $title_with_bg ) ? $title_with_bg : ''; ?>" <?php echo isset( $page_bg_image ) ? $page_bg_image : ''; ?>>
            <div class="wrapper">
                <h1 class="entry-title"><?php the_title(); ?></h1>
            </div> 
        </div>
    </header>-->

    <div class="wrapper">
    <div class="grids">
            <div class="grid-8 column-1">
        <?php
        // Enable/Disable sidebar based on the field selection
        if ( ! get_field( 'page_sidebar' ) || get_field( 'page_sidebar' ) == 'page_sidebar_on' ):
        ?>

        <?php endif; ?>

            <?php 
            if (have_posts()) : while (have_posts()) : the_post();
            ?>
            <div class="page-content">
           <?php the_content(); ?>
           </div>

 <article id="post-<?php the_ID(); ?>" <?php post_class(); ?>>

 <?php  $showfeatposts = "1";
$args = array(
'numberposts'     => $showfeatposts,
'orderby'         => 'post_date',
'order'           => 'DESC',
'post_type'       => 'post',
'cat'             => '58',
'post_status'     => 'publish',
'suppress_filters' => true 
);

$featposts = get_posts( $args );

foreach( $featposts as $post ) :  //setup_postdata($ppost); 
setup_postdata( $post );  ?>

    <div class="col-md-12 recent feat" id="recent">
     <figure class="entry-image inview">
      <?php if ( has_post_thumbnail() ) { ?>
      <a href="<?php the_permalink(); ?>">
       <?php the_post_thumbnail( 'rectangle-size-large' ); ?></a>
     <?php } ?>
 </figure>
        <header class="entry-header">
         <div class="entry-category">
          <?php the_author_posts_link(); ?> / <?php the_time('F jS, Y'); ?> </div>  
             <h2 class="entry-title" itemprop="headline">
             <a href="<?php echo get_permalink($post->ID); ?>"><?php echo $post->post_title; ?></a>
            </h2>
        </header>
 <div class="entry-content">
  <?php echo apply_filters("the_content", $post->the_excerpt) ; ?>
</div>
<div class="entry-category">
<span class="posted-on">By 
<span class="author vcard"><?php the_author_posts_link(); ?></span></span>
</div>
</div>
<?php 
$pnum++;
endforeach; ?>
    </article>

   <article id="post-<?php the_ID(); ?>" <?php post_class(); ?>>
     <div class="col-md-12 homehdr">
     <header class="section-header">
    <div class="title-with-sep">
    <h2 class="title">Recent Articles</h2>
    </div>
   </header>
   </div>

  <?php $showarticleposts = "4";

$args = array(
'numberposts'     => $showarticleposts,
'orderby'         => "post_date",
'order'           => 'DESC',
'post_type'       => 'post',
'cat'             => '5, -58',
'post_status'     => 'publish',
'suppress_filters' => true 
);

$artposts = get_posts( $args );

foreach( $artposts as $post ) :  //setup_postdata($ppost); 
 setup_postdata( $post );  ?>                   

         <div class="col-md-6 recent arts" id="arts">
           <figure class="entry-image inview">
              <?php if ( has_post_thumbnail() ) { ?>
                    <a href="<?php the_permalink(); ?>">
                        <?php the_post_thumbnail( 'rectangle-size' ); ?>
                    </a>
            <?php } ?></figure>
          <header class="entry-header">
         <div class="entry-category">
         <?php the_author_posts_link(); ?> / <?php the_time('F jS, Y'); ?></div>  
        <h2 class="entry-title" itemprop="headline">
          <a href="<?php echo get_permalink($post->ID); ?>"><?php echo $post->post_title; ?></a>
         </h2>
   </header>
   <div class="entry-content">
 <?php if ($post->post_excerpt) the_excerpt();  else { ?>
 <?php $content = apply_filters("the_content", $post->post_content);
 $content = strip_tags($content); 
 echo substr($content, 0, 100); }
  ?></div>
<div class="entry-category">
<span class="posted-on">By 
<span class="author vcard"><?php the_author_posts_link(); ?></span></span>
</div>
</div>
<?php 
$pnum++;
endforeach; ?>
</article>

<article id="post-<?php the_ID(); ?>" <?php post_class(); ?>>
    <div class="col-md-12 homehdr">
     <header class="section-header">
    <div class="title-with-sep">
    <h2 class="title">Recent Videos</h2>
    </div>
        </header>
        </div>
      <?php    $showvideoposts = "2";

$args = array(
'numberposts'     => $showvideoposts,
'orderby'         => 'post_date',
'order'           => 'DESC',
'post_type'       => 'post',
'cat'             => '3, -58',
'post_status'     => 'publish',
'suppress_filters' => true 
);

$vidposts = get_posts( $args );


foreach( $vidposts as $post ) :  //setup_postdata($ppost); 
 setup_postdata( $post );  ?>

                   <div class="col-md-6 recent vids">
    <?php $video_embed = wp_oembed_get( get_post_meta( $post->ID, 'add_video_url', true ) ); echo '<figure class="video-wrapper">' .$video_embed. '</figure>';  ?>

       <header class="entry-header">
        <div class="entry-category">
          <?php the_author_posts_link(); ?> / <?php the_time('F jS, Y'); ?> </div>  
         <h2 class="entry-title" itemprop="headline">
          <a href="<?php echo get_permalink($post->ID); ?>"><?php echo $post->post_title; ?></a>
       </h2>
  </header>
  <div class="entry-content">

<?php echo $post->the_content; ?>
</div>
    <div class="entry-category">
<span class="posted-on">By 
<span class="author vcard"><?php the_author_posts_link(); ?></span></span>
</div>
</div>
<?php 
$pnum++;
endforeach; ?>
                </article>


 <article id="post-<?php the_ID(); ?>" <?php post_class(); ?>>
 <div class="col-md-12 homehdr">
  <header class="section-header">
    <div class="title-with-sep">
        <h2 class="title">Recent Notes</h2>
    </div>
        </header>
        </div>
                <?php
                $shownoteposts = "2";
$args = array(
'numberposts'     => $shownoteposts,
'orderby'         => 'post_date',
'order'           => 'DESC',
'post_type'       => 'post',
'cat'             => '42',
'post_status'     => 'publish',
'suppress_filters' => true 
);

$noteposts = get_posts( $args );

foreach( $noteposts as $post ) :  //setup_postdata($ppost); 
 setup_postdata( $post );  ?>

        <div class="col-md-6 recent notes">

        <header class="entry-header">
      <div class="entry-category">
      <?php the_author_posts_link(); ?> / <?php the_time('F jS, Y'); ?>

</div>  
     <h2 class="entry-title" itemprop="headline">
  <a href="<?php echo get_permalink($post->ID); ?>"><?php echo $post->post_title; ?></a>
     </h2>
     </header>
     <div class="entry-content">

<?php echo apply_filters("the_excerpt", $post->the_excerpt) ; ?>
</div>
    <div class="entry-category">
<span class="posted-on">By 
<span class="author vcard"><?php the_author_posts_link(); ?></span></span>
</div>
</div>
<?php 
$pnum++;
endforeach; ?>
                </article>


<article id="post-<?php the_ID(); ?>" <?php post_class(); ?>>
               <div class="col-md-12 homehdr">
                <header class="section-header">
      <div class="title-with-sep">
        <h2 class="title">Recent Reports</h2>
    </div>
        </header>
        </div>
                <?php
                $showreports =  get_field('showreports');

$args = array(
'numberposts'     => $showreports,
'orderby'         => 'post_date',
'order'           => 'DESC',
'post_type'       => 'reports',
'post_status'     => 'publish',
'suppress_filters' => true 
);

$reptposts = get_posts( $args );

foreach( $reptposts as $post ) :  //setup_postdata($ppost); 
 setup_postdata( $post );  ?>

  <div class="col-md-6 recent rpts">
   <h2 class="report-title" itemprop="headline">
    <a href="<?php echo get_permalink($post->ID); ?>">
   <?php  echo(types_render_field("first-name", array('raw' => true))); echo(" ");
      echo(types_render_field("last-name", array('raw' => true))); ?></a>
          </h2>
         <p><strong>Posted by:</strong> <a href="<?php echo get_author_posts_url(get_the_author_meta('ID')); ?>" class="url fn n"  rel="author" itemprop="url">
    <span itemprop="name"><?php the_author_meta('display_name'); ?>
</span></a>  on <?php
$publish_date = '<time class="entry-date updated" datetime="' . get_the_time( 'c' ) . '" itemprop="datePublished">' . get_the_time( get_option( 'date_format' ) ) . '</time>';  echo $publish_date; ?><br />
    <strong>Dates Seen:</strong>  
<?php,$dates_seen = types_render_field("dates-seen", array('raw' => true)); echo($dates_seen); ?>
<br /> 
<strong>Affiliate:</strong>  
<?php echo(types_render_field("milb", array('raw' => true)));
<br />
   <strong>MLB Team</strong>
   <?php  echo(types_render_field("mlb-club", array('raw' => true))); ?>
     </p>
  </div>
<?php 
$pnum++;
endforeach; ?>
  </article>

 <?php endwhile; endif; ?>       

      <?php 
            // Enable/Disable comments
            if ( $ti_option['site_page_comments'] == 1 ) {
                comments_template();
            } ?>

            <?php
            // Enable/Disable sidebar based on the field selection
            if ( ! get_field( 'page_sidebar' ) || get_field( 'page_sidebar' ) == 'page_sidebar_on' ): ?>

</div>
            <?php get_sidebar(); ?>

        </div><!-- .grids -->
        <?php endif; ?>

    </div>
</section><!-- #content -->

<?php get_footer(); ?>

Answer 1

the_field()，根据定义，会将字段的值回显到页面上，而不是将其存储在变量中......相反，你想这样做：

$showarticleposts =  get_field('articles-posts-to-show');
$args = array(
    'numberposts'     => $showarticleposts,
    'orderby'         => "post_date",
    'order'           => 'DESC',
    'post_type'       => 'post',
    'cat'             => '5, -58',
    'post_status'     => 'publish',
    'suppress_filters' => true 
);

为确保它得到您想要的结果，请执行以下操作：var_dump( $showarticleposts ); 并查看是否如您声称的那样将 2 转储到页面上。您的第三个示例 "should" 有效，但是您在每个示例中使用了不同的 "field" 名称，因此很难判断 'showarticleposts' 或 'articles-posts-to-show' 是实际的字段名称.

更新

自从查看您的代码...我注意到您正在使用 setup_postdata( $post );。虽然这是一个很好用的东西，但它正在改变你的全局 $post 变量，因此当你调用 get_field() 时，它正在使用 "changed" $post 的 $post->ID ] 变量，这不是你想要的。您想要当前查看的页面的原始 $post->ID。因此，只需在您创建的每个自定义循环之后添加 wp_reset_postdata(); 即可解决问题。

更新 2 既然你提到它仍然不起作用，我唯一能想到的就是在页面的 最顶部 为原始页面 ID 设置一个变量...

$current_page_id = get_the_ID();

然后当您调用 get_field() 时，包括该 ID：

$showarticleposts = get_field( 'articles-posts-to-show', $current_page_id );

为什么我不能将自定义字段变量传递给 Wordpress 数组中的 'numberposts' 变量？

Why can't I pass a custom field variable to 'numberposts' variable in Wordpress array?

php

wordpress

advanced-custom-fields