php抛出异常

<?php
//创建可抛出一个异常的函数
function checkNum($number)
{
if($number>1)
{
throw new Exception("Value must be 1 or below");
}
return true;
}

checkNum(2);
?>

Fatal error: Uncaught exception 'Exception' with message 'Value must be 1 or below' in G:phpStudyPubliczititest.php:7 Stack trace: #0 G:phpStudyWWWmircowebmircowebwwwrootPubliczititest.php(12): checkNum(2) #1 {main} thrown in G:phpStudyWWWmircowebmircowebwwwrootPubliczititest.php on line 7

<?php
//创建可抛出一个异常的函数
function checkNum($number)
 {
 if($number>1)
  {
  throw new Exception("Value must be 111 or below");
  }
 return true;
 }

//在 "try" 代码块中触发异常
try
 {
 checkNum(2);
 //If the exception is thrown, this text will not be shown
 echo 'If you see this, the number is 1 or below';
 }

//捕获异常
catch(Exception $e)
 {
 echo 'Message: ' .$e->getMessage();
 }
?>

Message: Value must be 111 or below