Re: invalid params return value

2009/12/31 Stanislav Malyshev <stas@zend.com>: > Hi! > >> Would changing the returning value to Null to indicate invalid >> arguments (or any other error condition) would create a significant BC >> surely? Just how many functions are documented with the entity >> &return.falseforfailure;? (198 files using this so far vs Return >> &null; which is used very rarely). > > There are different kinds of failure. There's failure for the function (i.e. > function tried to do something and failed, like couldn't open the file) and > failure where function wheren't even executed (like you called fopen without > giving it a filename). Some functions return the same in both cases, some do > not. I'm sure half of the functions documented as &return.falseforfailure; > return NULL on incorrect args. > > As for BC - it may break some scripts that don't check properly but having > each function do different thing is worse, since you couldn't even write a > proper check - since you have no way of knowing what to check for. > Aha. I see, so, a big +1 for consistency for argument checking. -- ----- Richard Quadling "Standing on the shoulders of some very clever giants!" EE : http://www.experts-exchange.com/M_248814.html Zend Certified Engineer : http://zend.com/zce.php?c=ZEND002498&r=213474731 ZOPA : http://uk.zopa.com/member/RQuadling