PHP Exception Handling implementation code

CopyCode The Code is as follows: <? PHP
$ Path = "D: \ in.txt ";
Try // detect exceptions
{
File_open ($ PATH );
}
Catch (exception $ e) // catch an exception
{
Echo $ e-> getmessage ();
}

Function file_open ($ PATH)
{
If (! File_exists ($ PATH) // if the file cannot be found, an exception object is thrown.
{
Throw new exception ("the file cannot be found", 1 );
}

If (! Fopen ($ path, "R") // if the file cannot be opened, an exception is thrown.
{
Throw new exception ("file cannot be opened", 2 );
}
}
?>Copy codeThe Code is as follows: <? PHP
$ Path = "D: \ in.txt"; // file path
File_open ($ PATH); // call the file_open Function

Function file_open ($ PATH)
{
If (! File_exists ($ PATH) // if the file cannot be found, an exception object is thrown.
{
Throw new exception ("the file cannot be found", 1 );
}

If (! Fopen ($ path, "R") // if the file cannot be opened, an exception is thrown.
{
Throw new exception ("file cannot be opened", 2 );
}
}
?>Copy codeThe Code is as follows: <? PHP
Function exception_handler ($ e) // function used to handle exceptions
{
Echo "uncaptured exceptions:". $ e-> getmessage ();
}

Set_exception_handler ("exception_handler"); // sets the exception handling function.

Try // detect exceptions
{
$ Path = "D: \ in.txt ";
}
Catch (exception $ e) // catch an exception
{
Echo $ e-> getmessage ();
}

File_open ($ PATH); // call a function to open a file

Function file_open ($ PATH)
{
If (! File_exists ($ PATH) // if the file cannot be found, an exception object is thrown.
{
Throw new exception ("the file cannot be found", 1 );
}

If (! Fopen ($ path, "R") // if the file cannot be opened, an exception is thrown.
{
Throw new exception ("file cannot be opened", 2 );
}
}
?>Copy codeThe Code is as follows: <? PHP
$ Path = "D: \ in.txt ";

Try
{
File_open ($ PATH); // try to open the file
}
Catch (exception $ E)
{
Echo "exception information:". $ e-> getmessage (). "\ n"; // return user-defined exception information
Echo "Exception Code:". $ e-> getcode (). "\ n"; // return the custom Exception Code
Echo "file name:". $ e-> GetFile (). "\ n"; // return the PHPProgramFile Name
Echo "row where the Exception Code is located". $ e-> Getline (). "\ n"; // return the row number of the row where the Exception Code is located.
Echo "route :";
Print_r ($ e-> gettrace (); // returns the path of each trace exception in the form of an array
Echo $ e-> gettraceasstring (); // returns the gettrace function information formatted as a string.
}

Function file_open ($ PATH)
{
If (! File_exists ($ PATH) // if the file does not exist, an error is thrown.
{
Throw new exception ("the file cannot be found", 1 );
}

If (! Fopen ($ path, "R "))
{
Throw new exception ("file cannot be opened", 2 );
}
}
?>Copy codeThe Code is as follows: <? PHP
Class fileexistsexception extends exception {} // class used to handle non-existent file exceptions
Class fileopenexception extends exception {}// class used to handle unreadable file exceptions

$ Path = "D: \ in.txt ";

Try
{
File_open ($ PATH );
}
Catch (fileexistsexception $ e) // If a fileexistsexception exception occurs, the user is prompted to confirm the file location
{
Echo "An exception occurred when the program was running:". $ e-> getmessage (). "\ n ";
Echo "Please confirm the file location. ";
}
Catch (fileopenexception $ e) // If a fileopenexception occurs, the user is prompted to confirm the readability of the file.
{
Echo "An exception occurred when the program was running:". $ e-> getmessage (). "\ n ";
Echo "Make sure the file is readable. ";
}
Catch (exception $ E)
{
Echo "[unknown exception]";
Echo "exception information:". $ e-> getmessage (). "\ n"; // return user-defined exception information
Echo "Exception Code:". $ e-> getcode (). "\ n"; // return the custom Exception Code
Echo "file name:". $ e-> GetFile (). "\ n"; // return the PHP program file name with an exception
Echo "row where the Exception Code is located". $ e-> Getline (). "\ n"; // return the row number of the row where the Exception Code is located.
Echo "route :";
Print_r ($ e-> gettrace (); // returns the path of each trace exception in the form of an array
Echo $ e-> gettraceasstring (); // returns the gettrace function information formatted as a string.
}

Function file_open ($ PATH)
{
If (! File_exists ($ PATH ))
{
Throw new fileexistsexception ("file cannot be found", 1); // throw a fileexistsexception exception object
}

If (! Fopen ($ path, "R "))
{
Throw new fileopenexception ("file cannot be opened", 2); // throw a fileopenexception exception object

}
}
?>Copy codeThe Code is as follows: <? PHP
Class fileexistsexception extends exception {} // class used to handle non-existent file exceptions
Class fileopenexception extends exception {}// class used to handle unreadable file exceptions

$ Path = "D: \ in.txt ";

Try
{
File_open ($ PATH); // try to open the file
}
Catch (exception $ E)
{
Echo "[unknown exception]";
Echo "exception information:". $ e-> getmessage (). "\ n"; // return user-defined exception information
Echo "Exception Code:". $ e-> getcode (). "\ n"; // return the custom Exception Code
Echo "file name:". $ e-> GetFile (). "\ n"; // return the PHP program file name with an exception
Echo "row where the Exception Code is located". $ e-> Getline (). "\ n"; // return the row number of the row where the Exception Code is located.
Echo "route :";
Print_r ($ e-> gettrace (); // returns the path of each trace exception in the form of an array
Echo $ e-> gettraceasstring (); // returns the gettrace function information formatted as a string.
}
Catch (fileexistsexception $ e) // If a fileexistsexception exception occurs, the user is prompted to confirm the file location
{
Echo "An exception occurred when the program was running:". $ e-> getmessage (). "\ n ";
Echo "Please confirm the file location. ";
}
Catch (fileopenexception $ e) // If a fileopenexception occurs, the user is prompted to confirm the readability of the file.
{
Echo "An exception occurred when the program was running:". $ e-> getmessage (). "\ n ";
Echo "Make sure the file is readable. ";
}

Function file_open ($ PATH)
{
If (! File_exists ($ PATH) // if the file does not exist, an error is returned.
{
Throw new fileexistsexception ("file cannot be found", 1 );
}

If (! Fopen ($ path, "R "))
{
Throw new fileopenexception ("file cannot be opened", 2 );
}
}
?>Copy codeThe Code is as follows: <? PHP
Class fileexistsexception extends exception {} // class used to handle non-existent file exceptions
Class fileopenexception extends exception {}// class used to handle unreadable file exceptions

$ Path = "D: \ in.txt ";

Try
{
File_open ($ PATH );
}
Catch (fileexistsexception $ e) // If a fileexistsexception exception occurs, the user is prompted to confirm the file location
{
Echo "An exception occurred when the program was running:". $ e-> getmessage (). "\ n ";
Echo "Please confirm the file location. ";
}
Catch (fileopenexception $ e) // If a fileopenexception occurs, the user is prompted to confirm the readability of the file.
{
Echo "An exception occurred when the program was running:". $ e-> getmessage (). "\ n ";
Echo "Make sure the file is readable. ";
}
Catch (exception $ E)
{
Echo "[unknown exception]";
Echo "exception information:". $ e-> getmessage (). "\ n"; // return user-defined exception information
Echo "Exception Code:". $ e-> getcode (). "\ n"; // return the custom Exception Code
Echo "file name:". $ e-> GetFile (). "\ n"; // return the PHP program file name with an exception
Echo "row where the Exception Code is located". $ e-> Getline (). "\ n"; // return the row number of the row where the Exception Code is located.
Echo "route :";
Print_r ($ e-> gettrace (); // returns the path of each trace exception in the form of an array
Echo $ e-> gettraceasstring (); // returns the gettrace function information formatted as a string.
}

Function file_open ($ PATH)
{
Try
{
If (! File_exists ($ PATH ))
{
Throw new fileexistsexception ("file cannot be found", 1 );
}

If (! Fopen ($ path, "R")
{< br> throw new fileopenexception ("file cannot be opened", 2 );
}< BR >}< br> catch (exception $ e) // catch exceptions
{< br> echo "The file_open function encountered an exception while running ";
throw $ E; // throwing an exception
}< BR >?>