PHP error handling and exception handling method and example tutorial (1/2)

1, built-in exception handling class.
2. Examples of capturing and handling exceptions.
3, the member function of the Exception class GetMessage ().
4, the member function of the Exception class GetFile ().
5, the member function of the Exception class Getline ().
6, display warning or error message.
7, custom error handling function.

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1, built-in exception handling class.

The code is as follows

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Class exception { protected $message = ' Unknown exception '; Exception information protected $code = 0; User-defined exception codes protected $file; Name of the exception that occurred protected $line; Line number of the code where the exception occurred function __construct ($message = null, $code = 0);     final function getmessage ();                //Return exception information     final function getcode ();                   //Return exception code      Final function getfile ();                   //Returns the filename of the exception that occurred     final function getline ();                   //Return the code line number where the exception occurred     final function gettrace ();                  //BackTrace () array     final function gettraceasstring ();          //Gettrace () information that has been formatted as a string function __tostring (); A string that can be exported }

2. Examples of capturing and handling exceptions.

The code is as follows

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Try { $error = ' Throw exception information and jump out of Try block <br/> '; if (Is_dir ('./test ')) { Echo ' detects that. /CH16 is a catalogue '; Echo ' <br/> '; Echo ' may continue to do some other action '; Echo ' <br/> '; echo ' ... '; Echo ' <br/> '; } Else { throw new Exception ($error, 12345); } Echo ' Above throw exception, this line of code does not execute, instead executes catch block <br/> '; } catch (Exception $e) { Echo ' catches exception: '. $e->getmessage (). "<br/> Error code:". $e->getcode (). '    <br/> '; Show $error and 123456 Echo ' <br/> '; } Echo ' continued execution ';

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