set_exception_handler
(PHP 5, PHP 7, PHP 8)
set_exception_handler — Sets a user-defined exception handler function
Description
set_exception_handler(?callable $callback): ?callable
Sets the default exception handler if an exception is not caught within a try/catch block. Execution will stop after the callback
is called.
Parameters
-
callback
-
The function to be called when an uncaught exception occurs. Most errors are reported by throwing Error exceptions, which will be caught by the handler as well. Both Error and Exception implements the Throwable interface. This is the handler signature:
handler(Throwable $ex): void
null
may be passed instead, to reset this handler to its default state.
Return Values
Returns the previously defined exception handler, or null
on error. If no previous handler was defined, null
is also returned.
Examples
Example #1 set_exception_handler() example
<?php function exception_handler($exception) { echo "Uncaught exception: " , $exception->getMessage(), "\n"; } set_exception_handler('exception_handler'); throw new Exception('Uncaught Exception'); echo "Not Executed\n"; ?>
See Also
- restore_exception_handler() - Restores the previously defined exception handler function
- restore_error_handler() - Restores the previous error handler function
- error_reporting() - Sets which PHP errors are reported
- PHP 5 Exceptions
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Licensed under the Creative Commons Attribution License v3.0 or later.
https://www.php.net/manual/en/function.set-exception-handler.php