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我有一個名爲「縮略圖」的自定義字段，我目前使用它在我的Wordpress網站上顯示我的帖子的縮略圖。我最近買了一個新的模板，似乎無法讓代碼顯示這個工作。我認爲這是因爲新模板正在使用數組。在Wordpress中使用自定義字段縮略圖
目前，我只是把：
<img src="<?php echo get_post_meta($post->ID, Thumbnail, true); ?>"/>
並顯示完美。所以這裏是我相信我需要在新網站中更改的代碼：
看起來像是在使用數組？但是，我不太瞭解代碼以使其發揮作用。我試圖把我的代碼放在上面最後一行的img標籤中，但很確定我需要改變其他東西。
請幫忙！謝謝。
**更新* *
感謝您的信息@ Ehs4n和@Tim！仍然沒有運氣，但我決定嘗試更簡單的方法，通過刪除檢查數組的代碼部分。我感覺我很接近。這是我現在擁有的。
但仍沒有縮略圖顯示？不知道我缺少什麼，我有一個名爲Thumbnail的自定義字段，並在該帖子的服務器上顯示相應的鏈接。它甚至可以正常工作，當我把在實際的URL中的IMG SRC到的畫面，但是當我把代碼...
<?php echo get_post_meta($post->ID, Thumbnail, true); ?>
它像它不明白。 Firebug告訴我，src是空的，就像它沒有返回縮略圖自定義字段，因爲它應該是？
下面是整個文件，它是一個包含通過一個小工具來顯示在該網站的索引上的類別佈局。
<?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 $this->get_field_id('show_excerpt'); ?>">Show excerpt</label>
</p>
<?php }
}
?>
對不起，我不熟悉print_r的語法，但我實際上已將代碼更改爲不查找數組，只是嘗試將它傳遞給名爲縮略圖的自定義字段。看看我的原始問題，我更新了它。 – 2012-02-20 01:08:26
'print_r'很容易，你會喜歡它。只需鍵入'print_r（$ var）'，var'的內容就會很好地顯示出來，而不管類型如何 - 數組和對象被擴展，並且其他所有內容都正常顯示。 – Tim 2012-02-20 15:57:02