如果在函数中添加此项。主题文件夹中的php文件：

add_filter(\'upload_dir\', \'new_upload_dir\');

function new_upload_dir( $param ){
    $mydir = \'/wp-content/uploads\';

    $param[\'path\'] = $param[\'path\'] . $mydir;
    $param[\'url\'] = $param[\'url\'] . $mydir;

    error_log("path={$param[\'path\']}");  
    error_log("url={$param[\'url\']}");
    error_log("subdir={$param[\'subdir\']}");
    error_log("basedir={$param[\'basedir\']}");
    error_log("baseurl={$param[\'baseurl\']}");
    error_log("error={$param[\'error\']}"); 

    return $param;
}