On 8 August 2013 23:31, Yasuo Ohgaki <yohg...@ohgaki.net> wrote: > > How php_serialize would cause BC issues for PHP users? >
Not everyone uses PHP in the way you would expect. Just how many sites out there do you think use PHPs session functionality? I'd go for hundreds of millions, and that's a pretty big target to hit. If you session_encode() something on 5.x with default settings and 5.x+1 cannot session_decode() it with default settings, that is a BC break.