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(PHP 5, PHP 7, PHP 8)
restore_exception_handler — Restores the previously defined exception handler function
Used after changing the exception handler function using set_exception_handler(), to revert to the previous exception handler (which could be the built-in or a user defined function).
Зауваження:
While an exception handler is running, no exception handler is active: as of PHP 8.3.0 the engine unsets it before invoking it, so that an exception thrown by the handler is not passed back to it.
As of PHP 8.3.5 the engine also pushes the handler it is about to invoke onto the handler stack. A restore_exception_handler() call made from within an exception handler therefore pops that entry and re-installs the handler that is currently running; a second call is needed to install the handler that was active before it.
The running handler is re-installed automatically when it returns, but only if no exception handler is active at that point: a handler that calls set_exception_handler() or restore_exception_handler() is left in charge of the handler stack itself.
У цієї функції немає параметрів.
Завжди повертає true.
| Версія | Опис |
|---|---|
| 8.3.5 | The exception handler being invoked is now pushed onto the handler stack, so restore_exception_handler() called from within an exception handler re-installs the handler that is currently running; restoring the handler that was active before it now requires two calls. |
| 8.3.0 | The active exception handler is now unset while it runs. |
Приклад #1 restore_exception_handler() 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...');
?>Поданий вище приклад виведе:
[exception_handler_1] This triggers the first exception handler...
