php 異常處理實現(xiàn)代碼_PHP
Jun 01, 2016 pm 12:23 PM$path = "D:\\in.txt";
try //檢測異常
{
file_open($path);
}
catch(Exception $e) //捕獲異常
{
echo $e->getMessage();
}
function file_open($path)
{
if(!file_exists($path)) //如果文件無法找到,拋出異常對象
{
throw new Exception("文件無法找到", 1);
}
if(!fopen($path, "r")) //如果文件無法打開,拋出異常對象
{
throw new Exception("文件無法打開", 2);
}
}
?>
復制代碼 代碼如下:
$path = "D:\\in.txt"; //文件所在路徑
file_open($path); //調(diào)用file_open函數(shù)
function file_open($path)
{
if(!file_exists($path)) //如果文件無法找到,拋出異常對象
{
throw new Exception("文件無法找到", 1);
}
if(!fopen($path, "r")) //如果文件無法打開,拋出異常對象
{
throw new Exception("文件無法打開", 2);
}
}
?>
復制代碼 代碼如下:
function exception_handler($e) //用于處理異常的函數(shù)
{
echo "未捕獲的異常:".$e->getMessage();
}
set_exception_handler("exception_handler"); //設(shè)置異常處理函數(shù)
try //檢測異常
{
$path = "D:\\in.txt";
}
catch(Exception $e) //捕獲異常
{
echo $e->getMessage();
}
file_open($path); //調(diào)用函數(shù)打開文件
function file_open($path)
{
if(!file_exists($path)) //如果文件無法找到,拋出異常對象
{
throw new Exception("文件無法找到", 1);
}
if(!fopen($path, "r")) //如果文件無法打開,拋出異常對象
{
throw new Exception("文件無法打開", 2);
}
}
?>
復制代碼 代碼如下:
$path = "D:\\in.txt";
try
{
file_open($path); //嘗試打開文件
}
catch(Exception $e)
{
echo "異常信息:".$e->getMessage()."\n"; //返回用戶自定義的異常信息
echo "異常代碼:".$e->getCode()."\n"; //返回用戶自定義的異常代碼
echo "文件名:".$e->getFile()."\n"; //返回發(fā)生異常的PHP程序文件名
echo "異常代碼所在行".$e->getLine()."\n"; //返回發(fā)生異常的代碼所在行的行號
echo "傳遞路線:";
print_r($e->getTrace()); //以數(shù)組形式返回跟蹤異常每一步傳遞的路線
echo $e->getTraceAsString(); //返回格式化成字符串的getTrace函數(shù)信息
}
function file_open($path)
{
if(!file_exists($path)) //如果文件不存在,則拋出錯誤
{
throw new Exception("文件無法找到", 1);
}
if(!fopen($path, "r"))
{
throw new Exception("文件無法打開", 2);
}
}
?>
復制代碼 代碼如下:
class FileExistsException extends Exception{} //用于處理文件不存在異常的類
class FileOpenException extends Exception{} //用于處理文件不可讀異常的類
$path = "D:\\in.txt";
try
{
file_open($path);
}
catch(FileExistsException $e) //如果產(chǎn)生FileExistsException異常則提示用戶確認文件位置
{
echo "程序在運行過程中發(fā)生了異常:".$e->getMessage()."\n";
echo "請確認文件位置。";
}
catch(FileOpenException $e) //如果產(chǎn)生FileOpenException異常則提示用戶確認文件的可讀性
{
echo "程序在運行過程中發(fā)生了異常:".$e->getMessage()."\n";
echo "請確認文件的可讀性。";
}
catch(Exception $e)
{
echo "[未知異常]";
echo "異常信息:".$e->getMessage()."\n"; //返回用戶自定義的異常信息
echo "異常代碼:".$e->getCode()."\n"; //返回用戶自定義的異常代碼
echo "文件名:".$e->getFile()."\n"; //返回發(fā)生異常的PHP程序文件名
echo "異常代碼所在行".$e->getLine()."\n"; //返回發(fā)生異常的代碼所在行的行號
echo "傳遞路線:";
print_r($e->getTrace()); //以數(shù)組形式返回跟蹤異常每一步傳遞的路線
echo $e->getTraceAsString(); //返回格式化成字符串的getTrace函數(shù)信息
}
function file_open($path)
{
if(!file_exists($path))
{
throw new FileExistsException("文件無法找到", 1); //拋出FileExistsException異常對象
}
if(!fopen($path, "r"))
{
throw new FileOpenException("文件無法打開", 2); //拋出FileOpenException異常對象
}
}
?>
復制代碼 代碼如下:
class FileExistsException extends Exception{} //用于處理文件不存在異常的類
class FileOpenException extends Exception{} //用于處理文件不可讀異常的類
$path = "D:\\in.txt";
try
{
file_open($path); //嘗試打開文件
}
catch(Exception $e)
{
echo "[未知異常]";
echo "異常信息:".$e->getMessage()."\n"; //返回用戶自定義的異常信息
echo "異常代碼:".$e->getCode()."\n"; //返回用戶自定義的異常代碼
echo "文件名:".$e->getFile()."\n"; //返回發(fā)生異常的PHP程序文件名
echo "異常代碼所在行".$e->getLine()."\n"; //返回發(fā)生異常的代碼所在行的行號
echo "傳遞路線:";
print_r($e->getTrace()); //以數(shù)組形式返回跟蹤異常每一步傳遞的路線
echo $e->getTraceAsString(); //返回格式化成字符串的getTrace函數(shù)信息
}
catch(FileExistsException $e) //如果產(chǎn)生FileExistsException異常則提示用戶確認文件位置
{
echo "程序在運行過程中發(fā)生了異常:".$e->getMessage()."\n";
echo "請確認文件位置。";
}
catch(FileOpenException $e) //如果產(chǎn)生FileOpenException異常則提示用戶確認文件的可讀性
{
echo "程序在運行過程中發(fā)生了異常:".$e->getMessage()."\n";
echo "請確認文件的可讀性。";
}
function file_open($path)
{
if(!file_exists($path)) //如果文件不存在,則輸出錯誤
{
throw new FileExistsException("文件無法找到", 1);
}
if(!fopen($path, "r"))
{
throw new FileOpenException("文件無法打開", 2);
}
}
?>
復制代碼 代碼如下:
class FileExistsException extends Exception{} //用于處理文件不存在異常的類
class FileOpenException extends Exception{} //用于處理文件不可讀異常的類
$path = "D:\\in.txt";
try
{
file_open($path);
}
catch(FileExistsException $e) //如果產(chǎn)生FileExistsException異常則提示用戶確認文件位置
{
echo "程序在運行過程中發(fā)生了異常:".$e->getMessage()."\n";
echo "請確認文件位置。";
}
catch(FileOpenException $e) //如果產(chǎn)生FileOpenException異常則提示用戶確認文件的可讀性
{
echo "程序在運行過程中發(fā)生了異常:".$e->getMessage()."\n";
echo "請確認文件的可讀性。";
}
catch(Exception $e)
{
echo "[未知異常]";
echo "異常信息:".$e->getMessage()."\n"; //返回用戶自定義的異常信息
echo "異常代碼:".$e->getCode()."\n"; //返回用戶自定義的異常代碼
echo "文件名:".$e->getFile()."\n"; //返回發(fā)生異常的PHP程序文件名
echo "異常代碼所在行".$e->getLine()."\n"; //返回發(fā)生異常的代碼所在行的行號
echo "傳遞路線:";
print_r($e->getTrace()); //以數(shù)組形式返回跟蹤異常每一步傳遞的路線
echo $e->getTraceAsString(); //返回格式化成字符串的getTrace函數(shù)信息
}
function file_open($path)
{
try
{
if(!file_exists($path))
{
throw new FileExistsException("文件無法找到", 1);
}
if(!fopen($path, "r"))
{
throw new FileOpenException("文件無法打開", 2);
}
}
catch(Exception $e) //捕獲異常
{
echo "file_open函數(shù)在運行過程中出現(xiàn)異常";
throw $e; //重擲異常
}
}
?>

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