{"msg":"Uncaught InvalidArgumentException: Malformed UTF-8 characters, possibly incorrectly encoded in E:\\phpstudy_pro\\WWW\\source\\thinkphp\\library\\think\\response\\Json.php:39\nStack trace:\n#0 E:\\phpstudy_pro\\WWW\\source\\thinkphp\\library\\think\\Response.php(309): think\\response\\Json->output(false)\n#1 E:\\phpstudy_pro\\WWW\\source\\thinkphp\\library\\think\\Response.php(94): think\\Response->getContent()\n#2 E:\\phpstudy_pro\\WWW\\source\\thinkphp\\library\\think\\Error.php(52): think\\Response->send()\n#3 [internal function]: think\\Error::appException(Object(PDOException))\n#4 {main}\n  thrown","code":0}