How to stop transaction

Question

function Trigger_CheckOldPassword(&$tNG) {
return Trigger_UpdatePassword_CheckOldPassword($tNG);
This is check old password function in ADDT, I want to know what it return to break the transaction, because sometimes I want to do some check through custom trigger by myself, and I don't know how to stop the transaction if the result of my check means to stop.

Answer 1

Hi chan,
the function "Trigger_UpdatePassword_CheckOldPassword" sits in the file "includes/tng/triggers/tNG_defTrigg.inc.php".
Excerpt from the function documentation:
Check the old password in the database; In case of error return an error object;
If no error and the old password match the password entered by the user return null
So it seems that this function performs an either/or thing: you either get a variety of error messages returned, or the function just returns "null" aka "false" in case the passwords do match.
to break the transaction
breaking the transaction would actually mean to terminate the execution of the function "Trigger_UpdatePassword_CheckOldPassword", and you could try with using PHP´s native functions "exit" (or "die", what´s actually the same) in place of the original...
return null;
... line.
However, I´m not sure if trying this would have any advantage to you, because the only thing this function does is returning some error messages and otherwise just "die" anyway.
Cheers,
Günter Schenk
Adobe Community Expert, Dreamweaver