php - 在wordpress中使用wp_get_attachment_image()的正确方法

我正在寻找使用wp_get_attachment_image（）的正确方法。
以下代码：

<?php
    $args = array(
        'type' => 'attachment',
        'category_name' => 'portfolio'
        );
    $attachments = get_posts($args);
    print_r($attachments);
?>

生成以下结果：

Array
(
    [0] => stdClass Object
        (
            [ID] => 54
            [post_author] => 1
            [post_date] => 2010-06-22 00:32:46
            [post_date_gmt] => 2010-06-22 00:32:46
            [post_content] => <a href="http://localhost/wordpress/wp-content/uploads/2010/06/Capture.jpg"><img class="alignnone size-medium wp-image-55" title="Capture" src="http://localhost/wordpress/wp-content/uploads/2010/06/Capture-300x114.jpg" alt="" width="300" height="114" /></a>
            [post_title] => Our Own Site
            [post_excerpt] =>
            [post_status] => publish
            [comment_status] => open
            [ping_status] => open
            [post_password] =>
            [post_name] => our-own-site
            [to_ping] =>
            [pinged] =>
            [post_modified] => 2010-06-22 00:40:22
            [post_modified_gmt] => 2010-06-22 00:40:22
            [post_content_filtered] =>
            [post_parent] => 0
            [guid] => http://localhost/wordpress/?p=54
            [menu_order] => 0
            [post_type] => post
            [post_mime_type] =>
            [comment_count] => 0
            [filter] => raw
        )
)

但是，下面的代码没有返回任何内容。

<?php
    echo wp_get_attachment_image(54, array('300', '300'));
?>

我在这里做错什么了？

最佳答案

函数wp_get_attachment_image只获取上传到wordpress的图片，而不输出文章内容中的图片。
你必须为你的示例图片输出文章的内容。
喜欢：echo $attachments['post_content'];