PHP 异常构造函数

<?php
...
throw new Exception("Division by zero", 1);
...
?>

定义和用法

这个Exception()构造函数用于创建 Exception 对象并设置其一些属性。

new Exception(message, code, previous)

Parameter	Description
message	Optional. A string describing why the exception was thrown
code	Optional. An integer that can be used used to easily distinguish this exception from others of the same type
previous	Optional. If this exception was thrown in a catch block of another exception, it is recommended to pass that exception into this parameter