set_exception_handler
(PHP 5, PHP 7, PHP 8)
set_exception_handler — Sets a user-defined exception handler function
Description
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. This handler function needs to accept one parameter, which will be the Throwable object that was thrown. Both Error and Exception implement the Throwable interface. This is the handler signature:
nullmay 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(Throwable $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
