Re: [Discussion] Last chance for case-sensitive engine

On Wed, Feb 25, 2015 at 10:52 AM, Dmitry Stogov <dmitry@zend.com> wrote: > Hi Alexander, > > On Tue, Feb 24, 2015 at 10:48 AM, Alexander Lisachenko < > lisachenko.it@gmail.com> wrote: > >> Morning! >> >> I want to ask this question one more time before PHP7 feature freeze: can >> we the engine case sensitive from PHP>=7.0? >> >> There is a draft for that: >> https://wiki.php.net/rfc/case-sensitivity >> (mostly empty), so I decided to ask this question in the internals mail >> list. >> >> Pros: more simple O(1) hash table checks for properties, functions, >> methods, classes without strtolower normalization on the engine/parser >> level. Consistency with unicode class names (yes, they are case sensitive, >> check http://3v4l.org/ia0pc), consistency with exisiting >> PSR0,4 standards >> (case sensitive mapping of class names to the file names) >> >> From my experience, all modern PHP framework don't use case-insensitive >> code, so chance to break anything for them is really low. >> >> Cons: on the extension level things aren't so good and can be some BC >> breaks (like with phpng) >> >> Possible ways: >> >> 1) Keep PHP engine case-insensitive for PHP7 >> 2) Make PHP engine case-sensitive since PHP7 with possible minor BC breaks >> in the extensions (this breaks can be easily fixed) >> 3) Add a compile-time switch, eg. --with-case-sensitivity to the >> configuration to have an ability to build PHP with sensitivity and make >> this option enabled by default since next major version (PHP>=8.0). Add >> deprecation notices in 7.x >> >> Thoughts? >> > > I case we would designed a new language I would rise two hands. > Changing, syntax in an existent widely used language is an additional pain > for users. > Technically it shouldn't be very difficult to remove support for > case-insensitivity, and it'll even improve speed and memory consumption, > but I don't think it costs the compatibility break. I fully agree and why I will vote no on that. Even if I know many projects that won't even notice such changes. But I also have no idea how many 1000s projects out there won't be as happy. -- Pierre @pierrejoye | http://www.libgd.org