[13-Dec-2023 14:48:48 Asia/Shanghai] PHP Warning:  simplexml_load_string():                ^ in Library/Supervisor/Client.php on line 777
[13-Dec-2023 14:48:50 Asia/Shanghai] PHP Warning:  simplexml_load_string(): Entity: line 6: parser error : Input is not proper UTF-8, indicate encoding !
Bytes: 0xAA 0xE5 0xA4 0x84 in Library/Supervisor/Client.php on line 777
[13-Dec-2023 14:48:50 Asia/Shanghai] PHP Warning:  simplexml_load_string(): <value><string> Library/Supervisor/Client.php on line 777
[13-Dec-2023 14:48:50 Asia/Shanghai] PHP Warning:  simplexml_load_string():                ^ in Library/Supervisor/Client.php on line 777

上面这些抛错 , 简单描述下问题. 调用 Supervisor接口查看状态 , 需要读取 xml 数据, 之前有文章介绍过.
抛错告知存在不是 UTF-8格式的字符,

处理方案 , 强制转换格式即可

$xmlString = mb_convert_encoding($xmlString, 'UTF-8', 'UTF-8');