PHP教程：PHP中常见的错误与异常处理总结大全

PHP实例
 set_error_handler('reportError');
 $mess="";
 function reportError($error_type,$error_message,$error_file,$error_line){
 global $mess;
 $mess.="发生错误级别为{$error_type}类型,错位信息<b>{$error_message}</b>,在文件{$error_file}中,第{$error_line}行.<br>";
 }
 getType($a);
 echo "1111111<br>";
 getType();
 echo "2222<br>";
 echo $mess;
 /*发生错误级别为8类型,错位信息Undefined variable: a,在文件F:\projects\Frame\FrameTest\BackEnd\regularExpression.php中,第24行.
 发生错误级别为2类型,错位信息gettype() expects exactly 1 parameter, 0 given,在文件F:\projects\Frame\FrameTest\BackEnd\regularExpression.php中,第26行.*/

PHP实例
 try{
 echo "开车上班<br>";
 throw new Exception("车子爆胎了!");
 }catch(Exception $e){//相当于Exception $e = new Exception('');
 echo $e->getMessage().'<br>';
 echo '换上备胎,继续上班<br>'；
 }

PHP实例
 set_error_handler('reportError');
 function reportError($error_type,$error_message,$error_file,$error_line){
 if($error_type==E_WARNING){
 throw new Exception("错误信息：{$error_message},错误文件：{$error_file},错误行数{$error_line}");
 }
 }
 function drive($a){
 echo $a;
 }
 try{
 echo "开车上班<br>";
 drive();//忘记传参,触发自定义错误函数中警告性错误,抛出异常
 }catch(Exception $e){//相当于Exception $e = new Exception('');
 echo $e->getMessage().'<br>';
 echo "换上备胎,继续上班<br>";
 }

PHP实例
 class BTException extends Exception {
 function __construct($message){
 parent::__construct($message);
 }
 function method(){
 return "打开后备箱,拿出工具,换备胎";
 }
 }
 try{
 echo "开车上班<br>";
 throw new BTException("车子爆胎了!");
 }catch(BTException $e){//相当于Exception $e = new Exception('');
 echo $e->getMessage().'<br>';
 echo $e->method().'<br>';
 echo "换上备胎,继续上班<br>";
 }

PHP实例
 class Err1 extends Exception {
 function __construct($message){
 parent::__construct($message);
 }
 function method(){
 return "纠正错误1";
 }
 }
 class Err2 extends Exception {
 function __construct($message){
 parent::__construct($message);
 }
 function method(){
 return "纠正错误2";
 }
 }
 class Err3 extends Exception {
 function __construct($message){
 parent::__construct($message);
 }
 function method(){
 return "纠正错误3";
 }
 }
 $rand=rand(1,3);
 try{
 switch($rand){
 case 1:
 throw new Err1("发生错误1");
 case 2:
 throw new Err2("发生错误2"); 
 case 3:
 throw new Err3("发生错误3"); 
 }
 }catch(Err1 $e){
 echo $e->getMessage().'<br>';
 echo $e->method().'<br>';
 }catch(Err2 $e){
 echo $e->getMessage().'<br>';
 echo $e->method().'<br>';
 }catch(Err3 $e){
 echo $e->getMessage().'<br>';
 echo $e->method().'<br>';
 }