我有这个代码，它在列表中显示带有标题的图像。单击标题，会在附件页中打开图像，但单击图像，会打开背景为深灰色的图像。是否有一种方法可以在单击附件页时在其上显示图像？？我玩了很多，但没有成功。

$i = 0;
    $rand_id = mt_rand(1,1000);
    foreach ( $attachments as $id => $attachment ) {
        $image_attributes = wp_get_attachment_image_src( $id,\'large\' );


        $link = isset($attr[\'link\']) && \'file\' == $attr[\'link\'] ? \'<a href="\'.$image_attributes[0].\'"  rel="prettyPhoto[pp_\'.$rand_id.\']"><span class="mosaic-overlay"></span>\'.wp_get_attachment_image($id, $size, false).\'</a>\' : \'<a href="\'.$image_attributes[0].\'"  rel="prettyPhoto[pp_\'.$rand_id.\']"><span class="mosaic-overlay"></span>\'.wp_get_attachment_image($id, $size, false).\'</a>\';
        $output .= "<{$itemtag} class=\'gallery-item\'>";
        $output .= "
            <{$icontag} class=\'gallery-icon\'>
                $link
            </{$icontag}>";

         if ( $captiontag && trim($attachment->post_title) ) {  //caption display
            $output .= "
                <{$captiontag} class=\'gallery-caption\'>
                " .wp_get_attachment_link($id, $size, true, false, wptexturize($attachment->post_title))  . "
                </{$captiontag}>";
           }

        $output .= "</{$itemtag}>";
        if ( $columns > 0 && ++$i % $columns == 0 )
            $output .= \'<br style="clear: both" />\';
    }