update

app/Http/Controllers/api/NewPc.php

@@ -158,8 +158,10 @@ class NewPc extends BaseController
         //获取最新一期已开奖的数据
         $data2 = PcIssue::where('status', PcIssue::STATUS_DRAW)->orderByDesc('issue_no')->first();
 
-        $issue_no2 = $data2->issue_no + 1;
-        $issue_no2 .= '';
+
+        $issue_no2 = preg_replace('/\D/', '', $data2->issue_no);
+        $number = (int)$issue_no2 + 1;
+        $issue_no2 = "P" . $number;
         $data1 = PcIssue::where('issue_no', $issue_no2)->first();
         $end_time = $data1 ? strtotime($data1->end_time) : (bcadd(strtotime($data2->end_time), 210, 0));