Home > Backend Development > PHP Tutorial > Summary of PHP exception handling method examples, summary of handling method examples_PHP tutorial

Summary of PHP exception handling method examples, summary of handling method examples_PHP tutorial

WBOY
Release: 2016-07-13 09:48:50
Original
709 people have browsed it

A summary of examples of PHP exception handling methods, a summary of examples of handling methods

The examples in this article describe PHP exception handling methods. Share it with everyone for your reference. The details are as follows:

<&#63;php 
$path = "D://in.txt"; 
try //检测异常 
{ 
  file_open($path); 
} 
catch(Exception $e) //捕获异常 
{ 
  echo $e->getMessage(); 
} 
 
function file_open($path) 
{ 
  if(!file_exists($path))
  //如果文件无法找到,抛出异常对象 
  { 
    throw new Exception("文件无法找到", 1); 
  } 
  if(!fopen($path, "r"))
  //如果文件无法打开,抛出异常对象 
  { 
    throw new Exception("文件无法打开", 2); 
  } 
} 
&#63;> 

Copy after login
<&#63;php 
$path = "D://in.txt";
//文件所在路径 
file_open($path);
//调用file_open函数 
 
function file_open($path) 
{ 
  if(!file_exists($path))
  //如果文件无法找到,抛出异常对象 
  { 
    throw new Exception("文件无法找到", 1); 
  } 
  if(!fopen($path, "r"))
  //如果文件无法打开,抛出异常对象 
  { 
    throw new Exception("文件无法打开", 2); 
  } 
} 
&#63;> 

Copy after login
<&#63;php 
function exception_handler($e)
//用于处理异常的函数 
{ 
 echo "未捕获的异常:".$e->getMessage(); 
} 
 
set_exception_handler("exception_handler");
//设置异常处理函数 
try //检测异常 
{ 
  $path = "D://in.txt"; 
} 
catch(Exception $e) //捕获异常 
{ 
  echo $e->getMessage(); 
} 
file_open($path); //调用函数打开文件 
function file_open($path) 
{ 
  if(!file_exists($path))
  //如果文件无法找到,抛出异常对象 
  { 
    throw new Exception("文件无法找到", 1); 
  } 
  if(!fopen($path, "r"))
  //如果文件无法打开,抛出异常对象 
  { 
    throw new Exception("文件无法打开", 2); 
  } 
} 
&#63;> 
Copy after login
<&#63;php 
$path = "D://in.txt"; 
 
try 
{ 
  file_open($path); //尝试打开文件 
} 
catch(Exception $e) 
{ 
  echo "异常信息:".$e->getMessage()."/n";
  //返回用户自定义的异常信息 
  echo "异常代码:".$e->getCode()."/n";
  //返回用户自定义的异常代码 
  echo "文件名:".$e->getFile()."/n";
  //返回发生异常的PHP程序文件名 
  echo "异常代码所在行".$e->getLine()."/n";
  //返回发生异常的代码所在行的行号 
  echo "传递路线:"; 
  print_r($e->getTrace());
  //以数组形式返回跟踪异常每一步传递的路线 
  echo $e->getTraceAsString();
  //返回格式化成字符串的getTrace函数信息 
} 
function file_open($path) 
{ 
  if(!file_exists($path))
  //如果文件不存在,则抛出错误 
  { 
    throw new Exception("文件无法找到", 1); 
  } 
   
  if(!fopen($path, "r")) 
  { 
    throw new Exception("文件无法打开", 2); 
  } 
} 
&#63;> 

Copy after login
<&#63;php 
class FileExistsException extends Exception{}
//用于处理文件不存在异常的类 
class FileOpenException extends Exception{}
//用于处理文件不可读异常的类 
$path = "D://in.txt"; 
try 
{ 
  file_open($path); 
} 
catch(FileExistsException $e)
//如果产生FileExistsException异常则提示用户确认文件位置 
{ 
  echo "程序在运行过程中发生了异常:".$e->getMessage()."/n"; 
  echo "请确认文件位置。"; 
} 
catch(FileOpenException $e)
//如果产生FileOpenException异常则提示用户确认文件的可读性 
{ 
  echo "程序在运行过程中发生了异常:".$e->getMessage()."/n"; 
  echo "请确认文件的可读性。"; 
} 
catch(Exception $e) 
{ 
  echo "[未知异常]"; 
  echo "异常信息:".$e->getMessage()."/n";
  //返回用户自定义的异常信息 
  echo "异常代码:".$e->getCode()."/n";
  //返回用户自定义的异常代码 
  echo "文件名:".$e->getFile()."/n";
  //返回发生异常的PHP程序文件名 
  echo "异常代码所在行".$e->getLine()."/n";
  //返回发生异常的代码所在行的行号 
  echo "传递路线:"; 
  print_r($e->getTrace());
  //以数组形式返回跟踪异常每一步传递的路线 
  echo $e->getTraceAsString();
  //返回格式化成字符串的getTrace函数信息 
} 
function file_open($path) 
{ 
  if(!file_exists($path)) 
  { 
    throw new FileExistsException("文件无法找到", 1);
    //抛出FileExistsException异常对象 
  } 
   
  if(!fopen($path, "r")) 
  { 
    throw new FileOpenException("文件无法打开", 2);
    //抛出FileOpenException异常对象 
 
  } 
} 
&#63;> 

Copy after login
<&#63;php 
class FileExistsException extends Exception{}
//用于处理文件不存在异常的类 
class FileOpenException extends Exception{}
//用于处理文件不可读异常的类 
$path = "D://in.txt"; 
try 
{ 
  file_open($path); //尝试打开文件 
} 
catch(Exception $e) 
{ 
  echo "[未知异常]"; 
  echo "异常信息:".$e->getMessage()."/n";
  //返回用户自定义的异常信息 
  echo "异常代码:".$e->getCode()."/n";
  //返回用户自定义的异常代码 
  echo "文件名:".$e->getFile()."/n";
  //返回发生异常的PHP程序文件名 
  echo "异常代码所在行".$e->getLine()."/n";
  //返回发生异常的代码所在行的行号 
  echo "传递路线:"; 
  print_r($e->getTrace());
  //以数组形式返回跟踪异常每一步传递的路线 
  echo $e->getTraceAsString();
  //返回格式化成字符串的getTrace函数信息 
} 
catch(FileExistsException $e)
//如果产生FileExistsException异常则提示用户确认文件位置 
{ 
  echo "程序在运行过程中发生了异常:".$e->getMessage()."/n"; 
  echo "请确认文件位置。"; 
} 
catch(FileOpenException $e)
//如果产生FileOpenException异常则提示用户确认文件的可读性 
{ 
  echo "程序在运行过程中发生了异常:".$e->getMessage()."/n"; 
  echo "请确认文件的可读性。"; 
} 
function file_open($path) 
{ 
  if(!file_exists($path))
  //如果文件不存在,则输出错误 
  { 
    throw new FileExistsException("文件无法找到", 1); 
  } 
   
  if(!fopen($path, "r")) 
  { 
    throw new FileOpenException("文件无法打开", 2); 
  } 
} 
&#63;> 

Copy after login
<&#63;php 
class FileExistsException extends Exception{}
//用于处理文件不存在异常的类 
class FileOpenException extends Exception{}
//用于处理文件不可读异常的类 
$path = "D://in.txt"; 
try 
{ 
  file_open($path); 
} 
catch(FileExistsException $e)
//如果产生FileExistsException异常则提示用户确认文件位置 
{ 
  echo "程序在运行过程中发生了异常:".$e->getMessage()."/n"; 
  echo "请确认文件位置。"; 
} 
catch(FileOpenException $e)
//如果产生FileOpenException异常则提示用户确认文件的可读性 
{ 
  echo "程序在运行过程中发生了异常:".$e->getMessage()."/n"; 
  echo "请确认文件的可读性。"; 
} 
catch(Exception $e) 
{ 
  echo "[未知异常]"; 
  echo "异常信息:".$e->getMessage()."/n";
  //返回用户自定义的异常信息 
  echo "异常代码:".$e->getCode()."/n";
  //返回用户自定义的异常代码 
  echo "文件名:".$e->getFile()."/n";
  //返回发生异常的PHP程序文件名 
  echo "异常代码所在行".$e->getLine()."/n";
  //返回发生异常的代码所在行的行号 
  echo "传递路线:"; 
  print_r($e->getTrace());
  //以数组形式返回跟踪异常每一步传递的路线 
  echo $e->getTraceAsString();
  //返回格式化成字符串的getTrace函数信息 
} 
function file_open($path) 
{ 
  try 
  { 
    if(!file_exists($path)) 
    { 
      throw new FileExistsException("文件无法找到", 1); 
    } 
     
    if(!fopen($path, "r")) 
    { 
      throw new FileOpenException("文件无法打开", 2); 
    } 
  } 
  catch(Exception $e)               //捕获异常 
  { 
    echo "file_open函数在运行过程中出现异常"; 
    throw $e;                  //重掷异常 
  } 
} 
&#63;>

Copy after login

I hope this article will be helpful to everyone’s PHP programming design.

www.bkjia.comtruehttp: //www.bkjia.com/PHPjc/1021085.htmlTechArticleA summary of examples of PHP exception handling methods, a summary of examples of handling methods. This article describes the PHP exception handling method through examples. Share it with everyone for your reference. The details are as follows: php $path = "D://in.txt";...
Related labels:
source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template