fix

app/admin/controller/LivingAllowance.php

@@ -871,7 +871,7 @@ class LivingAllowance extends AdminController {
             $titleName = $startTime . "至" . $endTime . "硕博人才生活补贴申报公示名单";
         }
         if ($user["type"] == 2) {
-            $titleName = $startTime . "至" + $endTime . "硕博人才生活补贴申报公示名单";
+            $titleName = $startTime . "至" . $endTime . "硕博人才生活补贴申报公示名单";
         }
         export($title, $rows, $fileName, [], $titleName);
     }