请问这个 TP5 框架的页面，只要我一调用函数就疯狂重新加载是怎么回事？

请问一下这个代码需要修改什么地方，现在我就在页面加载的时候通过 self::zip($test)调用了一下那个函数，但是只要一加这一句网页就疯狂重新加载，去掉就好了请问各位大哥该如何修改呢？

<?php namespace app\admin\controller; use think\Config; use think\Exception; use think\Session;use think\Db; use app\admin\model\Crud; class Download extends Permissions { function download() { if (request()->isPjax()) { $search = ''; $tj = ''; if (Session::has('search')) { if (isset($_POST['search'])) { if (input('search') === '') { Session::set('search', null); } $search = input('search'); Session::set('search', $search); $sentence = "(filename like '%$search%')"; } else { $search = Session::get('search'); $sentence = "(filename like '%$search%')"; } } else { if (input('search') !== '') { $search = input('search'); Session::set('search', $search); $sentence = "(filename like '%$search%')"; } } // 开始时间，结束时间 if (input('start_time') != null && input('end_time') != null) { // 两个时间都不为空 $s = strtotime(input('start_time') . ' 00:00:00'); $e = strtotime(input('end_time') . ' 23:59:59'); $tj['create_time'][] = array('egt', $s); $tj['create_time'][] = array('elt', $e); } else if (input('start_time') != null || input('end_time') != null) { // 只选了一个时间点 $s = input('start_time') != null ? strtotime(input('start_time') . ' 00:00:00') : ''; $e = input('end_time') != null ? strtotime(input('end_time') . ' 23:59:59') : ''; $tj['create_time'] = input('start_time') == null ? array('elt', $e) : array('egt', $s); } $num = input('num') ? input('num') : 10; $this->assign('num', $num); // 将选择的参数传递至 HTML $this->assign(['start' => input('start_time'), 'end' => input('end_time')]);//选择的合同签订时间段 $this->assign('status', input('status')); $this->assign('low', input('low')); $this->assign('high', input('high')); $this->assign('search', $search); if (!empty($sentence)) { $download = Db::name('attachment')->where($tj)->where($sentence)->where('use', 'download_paper')->order('id', 'asc')->paginate($num); $test = Db::name('attachment')->where($tj)->where($sentence)->where('use', 'download_paper')->field('filepath,filename')->select(); } else { $download = Db::name('attachment')->where($tj)->where('use', 'download_paper')->order('id', 'asc')->paginate($num); $test = Db::name('attachment')->where($tj)->where('use', 'download_paper')->field('filepath,filename')->select(); } $page = $download->render(); $this->assign(['download' => $download, 'page' => $page]); $this->assign(['test' => json_encode($test)]); $hetOng= self::zip($test); $this->assign('hetong', $hetong); return $this->fetch(); } else { Session::delete('search'); $url = ''; $url .= '?page=' . (input('page') ? input('page') : ''); $url .= '&num=' . (input('num') ? input('num') : ''); $url .= '&start_time=' . (input('start_time') ? input('start_time') : ''); $url .= '&end_time=' . (input('end_time') ? input('end_time') : ''); $this->assign('url', $url); return $this->fetch('page'); } } function zip($test) { $current = getcwd(); if (count($test) > 0) { foreach ($test as $k => $v) { $files = $current . $v['filepath']; $zip = new \ZipArchive; $zipName = '\uploads\admin\admin_thumb\\' . time() . '.zip'; if ($zip->open($current .$zipName, \ZipArchive::CREATE) === TRUE) { $zip->addFile($files, $v['filename']); } } $zip->close(); return $zipName; } else{ return 0; } } } ?>