基于代码的其他Answer of mine 还有这个SO Answer.

它使用post/page/cpt发布日期来构建路径<请注意$the_post->post_date_gmt 也可用。

add_filter(\'wp_handle_upload_prefilter\', \'wpse_70946_handle_upload_prefilter\');
add_filter(\'wp_handle_upload\', \'wpse_70946_handle_upload\');

function wpse_70946_handle_upload_prefilter( $file )
{
    add_filter(\'upload_dir\', \'wpse_70946_custom_upload_dir\');
    return $file;
}

function wpse_70946_handle_upload( $fileinfo )
{
    remove_filter(\'upload_dir\', \'wpse_70946_custom_upload_dir\');
    return $fileinfo;
}

function wpse_70946_custom_upload_dir($path)
{   
    /*
     * Determines if uploading from inside a post/page/cpt - if not, default Upload folder is used
     */
    $use_default_dir = ( isset($_REQUEST[\'post_id\'] ) && $_REQUEST[\'post_id\'] == 0 ) ? true : false; 
    if( !empty( $path[\'error\'] ) || $use_default_dir )
        return $path; // Error: not uploading from a post/page/cpt 

    $the_post = get_post( $_REQUEST[\'post_id\'] );
    $y = date( \'Y\', strtotime( $the_post->post_date ) );
    $m = date( \'m\', strtotime( $the_post->post_date ) );
    $d = date( \'d\', strtotime( $the_post->post_date ) );

    $customdir = \'/\' . $y . \'/\' . $m . \'/\' . $d;

    $path[\'path\']    = str_replace($path[\'subdir\'], \'\', $path[\'path\']); //remove default subdir (year/month)
    $path[\'url\']     = str_replace($path[\'subdir\'], \'\', $path[\'url\']);      
    $path[\'subdir\']  = $customdir;
    $path[\'path\']   .= $customdir; 
    $path[\'url\']    .= $customdir;  

    return $path;
}