php7中系统自带异常类和自己创建异常类

1，系统自带异常类 try catch
<?php
try{
throw new Exception('96net.com.cn',10);
}catch(Exception $e){
echo $e->getMessage();
echo $e->getCode();
}

2，自己创建异常类

<?php
class MyException extends Exception{
function demo(){
echo "dc3688.com";
}
}
try{
throw new MyException('96net.com.cn',10);
}catch(Exception $e){
echo $e->getMessage();
echo $e->getCode();
echo $e->demo();
}