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php异常处理方法实例汇总
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php异常处理方法实例汇总

Jun 13, 2016 am 09:00 AM
php share deal with Example abnormal method Summary

php异常处理方法实例汇总

          本文实例讲述了php异常处理方法。分享给大家供大家参考。具体如下:

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$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);

}

}

?>

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$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);

}

}

?>

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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);

}

}

?>

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$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);

}

}

?>

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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

 

}

}

?>

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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);

}

}

?>

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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

}

}

?>

          希望本文所述对大家的php程序设计有所帮助。

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