我想展示画廊的标题和标题。下面是我的尝试，但我一直Notice: Trying to get property of non-object . 我还是不知道出了什么问题。

仅有一个的php

<div class="gallery-content">
        <?php 
        add_filter( \'shortcode_atts_gallery\', \'fullsize_gallery\' );     
        if( has_shortcode( $post->post_content, \'gallery\' ) ) :   

        $gallery = get_post_gallery_images( $post->ID );

        $image_list = \'<ul class="galleryslider" style="display: none;">\'; 

        foreach( $gallery as $image ) :
        $image_title = wp_get_attachment_url($image->post_title);
        $image_caption = wp_get_attachment_url($image->post_excerpt);
        // Loop through each image in each gallery
        $image_list .= \'<li><a href="\'. $image . \'" data-lightbox="\'.$post->ID.\'"><img src="\' . $image . \'" title="\'.$image_title.\'"/>\'.$image_caption.\'</a></li>\';
        endforeach; 
        $image_list .= \'</ul>\';                     
        echo $image_list;                           
        endif;
        ?>
    </div><!-- .gallery-content -->

function fullsize_gallery( $out )
{
    remove_filter( current_filter(), __FUNCTION__ );
    $out[\'size\'] = \'full\';
    return $out;
}