php抛出异常详解编程语言

<?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); 
?>

<?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(); 
 } 
?>