php man page for restore_exception_handler

RESTORE_EXCEPTION_HANDLER(3)						 1					      RESTORE_EXCEPTION_HANDLER(3)

restore_exception_handler - Restores the previously defined exception handler function

SYNOPSIS
       bool restore_exception_handler (void  )

DESCRIPTION
	Used  after  changing  the  exception  handler function using set_exception_handler(3), to revert to the previous exception handler (which
       could be the built-in or a user defined function).

RETURN VALUES
	This function always returns TRUE.

EXAMPLES
       Example #1

	      restore_exception_handler(3) example

	      <?php
		  function exception_handler_1(Exception $e)
		  {
		      echo '[' . __FUNCTION__ . '] ' . $e->getMessage();
		  }

		  function exception_handler_2(Exception $e)
		  {
		      echo '[' . __FUNCTION__ . '] ' . $e->getMessage();
		  }

		  set_exception_handler('exception_handler_1');
		  set_exception_handler('exception_handler_2');

		  restore_exception_handler();

		  throw new Exception('This triggers the first exception handler...');
	      ?>

	      The above example will output:

	      [exception_handler_1] This triggers the first exception handler...

SEE ALSO
       set_exception_handler(3), set_error_handler(3), restore_error_handler(3), error_reporting(3).

PHP Documentation Group 											      RESTORE_EXCEPTION_HANDLER(3)