这个应该是服务器的环境问题,解决办法是:
找到/uc_server/control/admin/seccode.php
include_once UC_ROOT.'lib/seccode.class.php';
$code = new seccode();
$code->code = $seccode;
$code->type = 0;
$code->width = 70;
$code->height = 21;
$code->background = 0;
$code->adulterate = 1;
//$code->ttf = 1;此处改成0
$code->ttf = 0;
$code->angle = 0;
$code->color = 1;
$code->size = 0;
$code->shadow = 1;
$code->animator = 0;
$code->fontpath = UC_ROOT.'images/fonts/';
$code->datapath = UC_ROOT.'images/';
$code->includepath = '';
$code->display();