


Summary of examples of php exception handling methods_PHP tutorial
A summary of examples of PHP exception handling methods
This article describes PHP exception handling methods through examples. Share it with everyone for your reference. The details are as follows:
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$path = "D://in.txt"; try //Detect exception { file_open($path); } catch(Exception $e) //Catch exception { echo $e->getMessage(); } function file_open($path) { if(!file_exists($path)) //If the file cannot be found, throw an exception object { throw new Exception("File cannot be found", 1); } if(!fopen($path, "r")) //If the file cannot be opened, throw an exception object { throw new Exception("File cannot be opened", 2); } } ?> |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | $path = "D://in.txt"; //The path where the file is located file_open($path); //Call the file_open function function file_open($path) { if(!file_exists($path)) //If the file cannot be found, throw an exception object { throw new Exception("File cannot be found", 1); } if(!fopen($path, "r")) //If the file cannot be opened, throw an exception object { throw new Exception("File cannot be opened", 2); } } ?> |
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function exception_handler($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 } } ?> |
I hope this article will be helpful to everyone’s PHP programming.

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