在www\mantisbt-1.2.10\config_inc.php中添加 $g_allow_file_upload=ON;
$g_file_upload_method=DISK;
$g_max_file_size =5000000;
$g_allowed_files ='txt,jpg,jepg,gif,bmp,png';
$g_absolute_path_default_upload_folder='D:\Program Files\EasyPHP-5.3.9\www\mantisbt-1.2.10\upload\\';
$g_preview_attachments_inline_max_size=3000000;