我正在尝试使用custom field 内部awidget 因此，它在循环之外。更进一步，我的主题是使用数组生成列表，这让我很难理解。
基本上，主题使用feature image 要显示每篇文章的缩略图，我想使用custom field. 以下是我需要更改的代码：
<?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; ?>
这是一个带有数组的计数器内部。
这似乎很容易做到，但我的编程技能非常有限。我不太了解PHP或WordPress，尤其是在循环外和使用数组时。
我想我只需要改变这一行：
<?php $image = wp_get_attachment_image_src(get_post_thumbnail_id($post->ID), \'widget-image\'); ?>
对于这样的事情（但它不起作用，我认为这是因为它在循环之外）：
<?php $image = get_post_meta($postid, \'Thumbnail\', true); ?>
In case you need to see more, here is the entire code on the widget page:
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 = \'\'; }?>
<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>
<?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 }
}
?>
非常感谢！
