php数组覆盖问题

   
 $add[$img_name] = $file['save_name']; 
//拼接数组添加 $add = [ 'title' => trim($_POST['title']), 'sec_title' => trim($_POST['sec_title']), 'starttime' => $starttime, 'endtime' => $endtime, 'publish_time' => $publish_time, 'ctime' => time(), 'is_end' => (int)$_POST['is_end'], 'status' => 0, 'sponsor' => trim($_POST['sponsor']), 'website' => $website, 'telphone' => trim($_POST['telphone']), 'email' => trim($_POST['email']), 'remarks' => trim($_POST['remarks']) ];

上面2个步骤，add数组第一个内容会覆盖，把2个过程颠倒一下，数组才会全部添加