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thrownewException('SUCCESS',SUCCESS);后面那个SUCCESS是啥意思?

throw new Exception('SUCCESS', SUCCESS);后面那个SUCCESS是啥意思?

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throw new Exception('SUCCESS', SUCCESS);后面那个SUCCESS是啥意思?

http://php.com/manual/en/exception.construct.php

异常代号,是一个 int 类型,应该是之前有定义过 const SUCCESS = 1; 之类的。