在模板函数中添加如下代码：
//上传图片自动重命名
add_filter(‘wp_handle_upload_prefilter’, ‘custom_upload_filter’ );
function custom_upload_filter( $file ){
$info = pathinfo($file[‘name’]);
$ext = $info[‘extension’];
$filedate = date(‘ymd-His-‘).rand(10,99);
$file[‘name’] = $filedate.’.’.$ext;
return $file;
}