For a long time, there was a PHP6 in the works, but then HHVM and Hack came around and started making PHP6 look bad. There was another fork called PHP-NG, I believe, which went in a different direction. There was a huge pissing match in the internals list, and in the end, I think they threw threw out most of the PHP6 proposals and started fresh. To clear up matters, they skipped PHP6 and called it PHP7.<p>Don&#x27;t quote me on that, but that&#x27;s my understanding of it.