Re: Re: left/right order of assignment and ++ increment changed? 5.0.x -->5.1.x

Sara Golemon wrote:

Seems the order or left vs right assignment evaluation has changed somehow recently in my upgrade to PHP 5.1.4. See the following code:

That's is indeed a quirk of a change in the way variables are retreived/stored between 5.0 and 5.1. Is it an unexpected BC break? In functional terms yes, but technically no. As mike already replied, using the same var more than once in a single expression where the value of the variable is expected to change is (and has always been) considered "undefined behavior". I'd recommend changing your statement to: $data[$index] = $index; ++$index; And before you complain about the "extra work" for the engine, let me just mention this is still lighter weight than what 5.0 and 4.x were doing.

No complaints here. This is a change I can easily work around and don't mind the BC breakage. Just wanted to illuminate the error to internals just in case it would reflect upon possible breakage elsewhere. I worked around the undefined behavior before the first email was sent ;-) Keep up the good work all. Dante