我有一个名为“缩略图”的自定义字段，我目前用它来显示我的Wordpress网站上我的帖子的缩略图。我最近买了一个新模板，似乎无法获得显示此功能的代码。我认为这是因为新模板使用的是数组。
目前，我只需要提出：
<img src="<?php echo get_post_meta($post->ID, Thumbnail, true); ?>"/>
它完美显示。所以这是我认为我需要在新网站中更改的代码：
<?php if($counter <= $big_count): ?>
<?php if($counter == $big_count) { $last = ‘block-item-big-last’; } else { $last = ”; }?>
<div class="block-item-big <?php echo $last; ?>">
<?php if($images && has_post_thumbnail()): ?>
<?php $image = wp_get_attachment_image_src(get_post_thumbnail_id($post->ID), ‘widget-image’); ?>
<div class="block-image"><a href=’<?php the_permalink(); ?>’ title=’<?php the_title(); ?>’><img src="<?php echo $image[0]; ?>" alt="<?php the_title(); ?>" width=’290′ height=’160′ />
看起来它正在使用数组？但是我对代码的了解不够充分。我试着把我的代码放在上面最后一行的img标签中，但很确定我需要改变别的东西。
请帮忙！感谢。
的 的 **更新* *
感谢@ Ehs4n和@Tim的信息！仍然没有运气，但我决定尝试一种更简单的方法，删除检查数组的代码部分。我觉得我很亲密。这就是我现在所拥有的。
<?php if (in_category('movies') ): ?>
<div class="block-item-big-<?php echo $last; ?>">
<div class="block-image"><a href='<?php the_permalink(); ?>' title='<?php the_title(); ?>'><img src="<?php echo get_post_meta($post->ID, Thumbnail, true); ?>" alt="<?php the_title(); ?>"/></a><?php echo $icon; ?></div>
但仍然没有缩略图显示？不知道我缺少什么，我有一个名为Thumbnail的自定义字段，其中包含指向该帖子服务器上图片的相应链接。当我将img src中的实际URL放入该图片时，它甚至可以正常工作但是当我输入代码时...
<?php echo get_post_meta($post->ID, Thumbnail, true); ?>
就像它不明白那样。 Firebug告诉我src是空的，就好像它不应该返回缩略图自定义字段一样？
以下是整个文件，它是通过Widget包含在网站索引上显示类别布局。
<?php
add_action('widgets_init', 'pyre_homepage_1col_load_widgets');
function pyre_homepage_1col_load_widgets()
{
register_widget('Pyre_Homepage_1col_Widget');
}
class Pyre_Homepage_1col_Widget extends WP_Widget {
function Pyre_Homepage_1col_Widget()
{
$widget_ops = array('classname' => 'pyre_homepage_1col', 'description' => 'Homepage 1-column recent posts widget.');
$control_ops = array('id_base' => 'pyre_homepage_1col-widget');
$this->WP_Widget('pyre_homepage_1col-widget', 'Avenue Theme: Home 1-column', $widget_ops, $control_ops);
}
function widget($args, $instance)
{
extract($args);
$title = $instance['title'];
$post_type = 'all';
$categories = $instance['categories'];
$posts = $instance['posts'];
$images = true;
$rating = true;
$show_excerpt = isset($instance['show_excerpt']) ? 'true' : 'false';
echo $before_widget;
?>
<?php
$post_types = get_post_types();
unset($post_types['page'], $post_types['attachment'], $post_types['revision'], $post_types['nav_menu_item']);
if($post_type == 'all') {
$post_type_array = $post_types;
} else {
$post_type_array = $post_type;
}
?>
<div class="block full">
<h3><a href="<?php echo get_category_link($categories); ?>"><?php echo $title; ?></a> <span class="arrows">»</span></h3>
<?php
$recent_posts = new WP_Query(array(
'showposts' => $posts,
'cat' => $categories,
));
?>
<?php
$big_count = round($posts / 4);
if(!$big_count) { $big_count = 1; }
?>
<?php $counter = 1; while($recent_posts->have_posts()): $recent_posts->the_post(); ?>
<?php
if(has_post_format('video') || has_post_format('audio') || has_post_format('gallery')) {
$icon = '<span class="' . get_post_format($post->ID) . '-icon"></span>';
} else {
$icon = '';
}
?>
<?php if($counter <= $big_count): ?>
<?php if($counter == $big_count) { $last = 'block-item-big-last'; } else { $last = ''; }?>
<!-- Movies Category -->
<?php if (in_category('movies') ): ?>
<div class="block-item-big-Movies <?php echo $last; ?>">
<div class="block-image"><a href='<?php the_permalink(); ?>' title='<?php the_title(); ?> movie review'><img src="<?php echo get_post_meta($post->ID, Thumbnail, true); ?>"/></a><?php echo $icon; ?></div>
<h2><a href='<?php the_permalink(); ?>' title='<?php the_title(); ?> movie review'><?php the_title(); ?></a></h2>
<span class="block-meta"><?php the_time('F j, Y'); ?>, <?php comments_popup_link(); ?></span>
<?php if($show_excerpt == 'true'): ?><p><?php echo string_limit_words(get_the_excerpt(), 15); ?> ...</p><?php endif; ?>
</div>
<!-- END Movies Category -->
<!-- Music Category -->
<?php elseif (in_category('music') ): ?>
<div class="block-item-big <?php echo $last; ?>">
<?php if($images && has_post_thumbnail()): ?>
<?php $image = wp_get_attachment_image_src(get_post_thumbnail_id($post->ID), 'widget-image'); ?>
<div class="block-image"><a href='<?php the_permalink(); ?>' title='<?php the_title(); ?>'><img src="<?php echo $image[0]; ?>" alt="<?php the_title(); ?>" width='290' height='160' /></a><?php echo $icon; ?></div>
<?php else: ?>
<div class="block-image"><a href='<?php the_permalink(); ?>' title='<?php the_title(); ?>'><img src="<?php bloginfo('template_directory'); ?>/timthumb.php?src=<?php bloginfo('template_directory'); ?>/images/thumbnail.png&w=290&h=160" alt="<?php the_title(); ?>" width='290' height='160' /></a><?php echo $icon; ?></div>
<?php endif; ?>
<h2><a href='<?php the_permalink(); ?>' title='<?php the_title(); ?>'><?php the_title(); ?></a></h2>
<span class="block-meta"><?php the_time('F j, Y'); ?>, <?php comments_popup_link(); ?></span>
<?php if($show_excerpt == 'true'): ?><p><?php echo string_limit_words(get_the_excerpt(), 15); ?> ...</p><?php endif; ?>
</div>
<!-- END Music Category -->
<!-- Else Default Display -->
<?php else: ?>
<div class="block-item-big <?php echo $last; ?>">
<?php if($images && has_post_thumbnail()): ?>
<?php $image = wp_get_attachment_image_src(get_post_thumbnail_id($post->ID), 'widget-image'); ?>
<div class="block-image"><a href='<?php the_permalink(); ?>' title='<?php the_title(); ?>'><img src="<?php echo $image[0]; ?>" alt="<?php the_title(); ?>" width='290' height='160' /></a><?php echo $icon; ?></div>
<?php else: ?>
<div class="block-image"><a href='<?php the_permalink(); ?>' title='<?php the_title(); ?>'><img src="<?php bloginfo('template_directory'); ?>/timthumb.php?src=<?php bloginfo('template_directory'); ?>/images/thumbnail.png&w=290&h=160" alt="<?php the_title(); ?>" width='290' height='160' /></a><?php echo $icon; ?></div>
<?php endif; ?>
<h2>MUSIC<a href='<?php the_permalink(); ?>' title='<?php the_title(); ?>'><?php the_title(); ?></a></h2>
<span class="block-meta"><?php the_time('F j, Y'); ?>, <?php comments_popup_link(); ?></span>
<?php if($show_excerpt == 'true'): ?><p><?php echo string_limit_words(get_the_excerpt(), 15); ?> ...</p><?php endif; ?>
</div>
<!-- END Normal Display -->
<?php endif; ?>
<?php else: ?>
<div class="block-item-small">
<?php if($images && has_post_thumbnail()): ?>
<?php $image = wp_get_attachment_image_src(get_post_thumbnail_id($post->ID), 'widget-image-thumb'); ?>
<div class="block-image"><a href='<?php the_permalink(); ?>' title='<?php the_title(); ?>'><img src="<?php echo $image[0]; ?>" alt="<?php the_title(); ?>" width='50' height='50' /></a><?php echo $icon; ?></div>
<?php else: ?>
<div class="block-image"><a href='<?php the_permalink(); ?>' title='<?php the_title(); ?>'><img src="<?php bloginfo('template_directory'); ?>/timthumb.php?src=<?php bloginfo('template_directory'); ?>/images/thumbnail.png&w=50&h=50" alt="<?php the_title(); ?>" width='50' height='50' /></a><?php echo $icon; ?></div>
<?php endif; ?>
<h2><a href='<?php the_permalink(); ?>' title='<?php the_title(); ?>'><?php the_title(); ?></a></h2>
<span class="block-meta"><?php the_time('F j, Y'); ?>, <?php comments_popup_link(); ?></span>
</div>
<?php endif; ?>
<?php $counter++; endwhile; ?>
</div>
<?php
echo $after_widget;
}
function update($new_instance, $old_instance)
{
$instance = $old_instance;
$instance['title'] = $new_instance['title'];
$instance['post_type'] = 'all';
$instance['categories'] = $new_instance['categories'];
$instance['posts'] = $new_instance['posts'];
$instance['show_images'] = true;
$instance['show_rating'] = true;
$instance['show_excerpt'] = $new_instance['show_excerpt'];
return $instance;
}
function form($instance)
{
$defaults = array('title' => 'Recent Posts', 'post_type' => 'all', 'categories' => 'all', 'posts' => 4, 'show_excerpt' => null);
$instance = wp_parse_args((array) $instance, $defaults); ?>
<p>
<label for="<?php echo $this->get_field_id('title'); ?>">Title:</label>
<input class="widefat" style="width: 216px;" id="<?php echo $this->get_field_id('title'); ?>" name="<?php echo $this->get_field_name('title'); ?>" value="<?php echo $instance['title']; ?>" />
</p>
<p>
<label for="<?php echo $this->get_field_id('categories'); ?>">Filter by Category:</label>
<select id="<?php echo $this->get_field_id('categories'); ?>" name="<?php echo $this->get_field_name('categories'); ?>" class="widefat categories" style="width:100%;">
<option value='all' <?php if ('all' == $instance['categories']) echo 'selected="selected"'; ?>>all categories</option>
<?php $categories = get_categories('hide_empty=0&depth=1&type=post'); ?>
<?php foreach($categories as $category) { ?>
<option value='<?php echo $category->term_id; ?>' <?php if ($category->term_id == $instance['categories']) echo 'selected="selected"'; ?>><?php echo $category->cat_name; ?></option>
<?php } ?>
</select>
</p>
<p>
<label for="<?php echo $this->get_field_id('posts'); ?>">Number of posts:</label>
<input class="widefat" style="width: 30px;" id="<?php echo $this->get_field_id('posts'); ?>" name="<?php echo $this->get_field_name('posts'); ?>" value="<?php echo $instance['posts']; ?>" />
</p>
<p>
<input class="checkbox" type="checkbox" <?php checked($instance['show_excerpt'], 'on'); ?> id="<?php echo $this->get_field_id('show_excerpt'); ?>" name="<?php echo $this->get_field_name('show_excerpt'); ?>" />
<label for="<?php echo $this->get_field_id('show_excerpt'); ?>">Show excerpt</label>
</p>
<?php }
}
?>
答案 0 :(得分：0)
投入print_r($image)以查明Image是否为数组。使用image[0]会产生什么结果？
答案 1 :(得分：0)
如果您使用自定义字段存储缩略图路径，为什么您会对模板中使用的代码感到困惑。
您仍然可以使用旧代码来获取图片
<?php echo get_post_meta($post->ID, Thumbnail, true); ?>
查看模板的代码，它使用Wordpress函数wp_get_attachment_image_src()，它使用三个参数$attachement_id - 传递该媒体的ID，$size - 媒体大小/图像大小以显示和放大;第三个可选$icon，用于显示代表附件的图标。在这里，您将图像集的$ attachment_id作为帖子缩略图在帖子和大小中传递。该函数反过来返回一个包含url，width和height的数组，url是第一个，所以使用$image[0]将返回图像的url，这很好。
如果图片仍然没有显示，您需要确认是否在帖子中附加了图片作为帖子缩略图，$images变量在true子句上返回if。