set_exception_handler(3) [php man page]

SET_EXCEPTION_HANDLER(3)						 1						  SET_EXCEPTION_HANDLER(3)

set_exception_handler - Sets a user-defined exception handler function

SYNOPSIS

       callable set_exception_handler (callable  $exception_handler)

DESCRIPTION

	Sets  the  default exception handler if an exception is not caught within a try/catch block. Execution will stop after the $exception_han-
       dler is called.

PARAMETERS

	      o $exception_handler
		- Name of the function to be called when an uncaught exception occurs. This handler function needs to accept one parameter,  which
		will be the exception object that was thrown. This is the handler signature:
		void handler (Exception  $ex) NULL may be passed instead, to reset this handler to its default state.

	      Caution

		      Note  that  providing  an  explicit  Exception  type  hint for the $ex parameter in your callback will cause issues with the
		     changed exception hierarchy in PHP 7.

RETURN VALUES

	Returns the name of the previously defined exception handler, or NULL on error. If no previous handler was defined, NULL is also returned.

CHANGELOG

       +--------+---------------------------------------------------+
       |Version |						    |
       |	|						    |
       |	|		     Description		    |
       |	|						    |
       +--------+---------------------------------------------------+
       | 5.5.0	|						    |
       |	|						    |
       |	|  Previously, if NULL was passed then	this  func- |
       |	| tion	returned TRUE. It returns the previous han- |
       |	| dler since PHP 5.5.0. 			    |
       |	|						    |
       +--------+---------------------------------------------------+
EXAMPLES

       Example #1

	      set_exception_handler(3) example

	      <?php
	      function exception_handler($exception) {
		echo "Uncaught exception: " , $exception->getMessage(), "
";
	      }

	      set_exception_handler('exception_handler');

	      throw new Exception('Uncaught Exception');
	      echo "Not Executed
";
	      ?>

SEE ALSO

       restore_exception_handler(3), restore_error_handler(3), error_reporting(3), information about the callback type, PHP 5 Exceptions.

PHP Documentation Group 												  SET_EXCEPTION_HANDLER(3)

Template::Exception(3)					User Contributed Perl Documentation				    Template::Exception(3)

NAME

       Template::Exception - Exception handling class module

SYNOPSIS

	   use Template::Exception;

	   my $exception = Template::Exception->new($type, $info);
	   $type = $exception->type;
	   $info = $exception->info;
	   ($type, $info) = $exception->type_info;

	   print $exception->as_string();

	   $handler = $exception->select_handler(@candidates);

DESCRIPTION

       The "Template::Exception" module defines an object class for representing exceptions within the template processing life cycle.	Exceptions
       can be raised by modules within the Template Toolkit, or can be generated and returned by user code bound to template variables.

       Exceptions can be raised in a template using the "THROW" directive,

	   [% THROW user.login 'no user id: please login' %]

       or by calling the throw() method on the current Template::Context object,

	   $context->throw('user.passwd', 'Incorrect Password');
	   $context->throw('Incorrect Password');    # type 'undef'

       or from Perl code by calling "die()" with a "Template::Exception" object,

	   die (Template::Exception->new('user.denied', 'Invalid User ID'));

       or by simply calling "die()" with an error string.  This is automagically caught and converted to an  exception of '"undef"' type (that's
       the literal string '"undef"' rather than Perl's undefined value) which can then be handled in the usual way.

	   die "I'm sorry Dave, I can't do that";

       Each exception is defined by its type and a information component (e.g. error message).	The type can be any identifying string and may
       contain dotted components (e.g. '"foo"', '"foo.bar"', '"foo.bar.baz"').	Exception types are considered to be hierarchical such that
       '"foo.bar"' would be a specific type of the more general '"foo"' type.

METHODS

   type()
       Returns the exception type.

   info()
       Returns the exception information.

AUTHOR

       Andy Wardley <abw@wardley.org> <http://wardley.org/>

COPYRIGHT

       Copyright (C) 1996-2007 Andy Wardley.  All Rights Reserved.

       This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

SEE ALSO

       Template, Template::Context

perl v5.16.3							    2011-12-20						    Template::Exception(3)