Wordpress将所有图像保存为帖子类型，称为附件。您需要运行查询来检索这些附件。您还需要指定要检索的附件类型，因为并非所有附件都是图像。视频、pdf文件和音频文件也是附件，因此您需要将mime类型指定为图像。以下是检索所有图像的查询

<?php 
$new_query = new WP_Query(array(
    \'posts_per_page\'   => 1
));

while ($new_query->have_posts()) : $new_query->the_post();
    $args = array (
        \'post_type\' => \'attachment\',
        \'numberposts\' => -1,
        \'status\' => \'publish\',
        \'post_mime_type\' => \'image\',
        \'parent\' => $post->ID
    ); 

    $attachments = get_posts($args);

    if ( $attachments ) {
        foreach ( $attachments as $attachment ) {
            echo \'<div class="oneCell">\';
            echo \'<a href="\' . get_permalink( $post->ID ) . \'">\';
            echo wp_get_attachment_image( $attachment->ID, \'full\' );
            echo \'</a>\';
            echo \'</div>\';
        }
    }
endwhile;
wp_reset_postdata();
?>