result:

string(608) " 502 Bad Gateway

502 Bad Gateway

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: https://api.miaodiyun.com/20150822/affMarkSMS/sendSMS
Server: izwz96vz1lb6ilrc92mx16z
Date: 2025/05/09 13:46:45
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"