PHP AJAX error handling - php

Question

I currently handle errors during AJAX requests in a manner similar to this:
try {
// code
if (some_error_condition) {
throw new \Exception('error');
}
// other code
if (some_other_error_condition) {
throw new \Exception('other error');
}
// more code
$response = array(
'success' => TRUE,
'data' => 'stuff here'
);
} catch (Exception $e) {
$response = array(
'success' => FALSE,
'error' => $e->getMessage()
);
}
header('Content-Type: application/json');
echo json_encode($response);
My question is: is there a better way to handle multiple possible error conditions than this, while still adhering to DRY principles? I think this method is much cleaner and easier to follow than giant nested if/else messes, but it's a little reminiscent of goto code.
Perhaps an OOP way?

Answer 1

it is completely valid solution for me, except you could use different exception classes for your exception and encapsulate actual logic in some object, like
class Handler {
//this function executes code and throws exception - no error handling logic.
public static function doSomeCode() {
(...)
return $response;
}
}
try {
$response = Handler::doSomeCode();
renderResponse();
} catch (SomeError $e) {
$err = 'some error';
renderError($err);
} catch (Exception $e) {
header('500 Internal Server Error'); //this is pseudo code!
}
your exception classes (except generic Exception) could handle rendering errors, Exception class would trigger 500 (it should never happend). This way you separate actual code execution from error handling, and with proper exceptions object model dont repeat yourself with error handling.