Re: Parse error: Invalid body indentation level

> > Yes, this is an expected result under the flexible heredoc RFC. To avoid > > issues, please use a heredoc label that does not occur within the string. > > Hmkay, so code that worked fine with PHP 7.1 and PHP 7.2 breaks with PHP > 7.3. This breaking change should at least be prominently documented. As of > right now, I do not see such documentation in UPGRADING. Wow, I can't believe I didn't think of this when I reviewed that RFC. This is potentially a pretty serious BC break, really - at least in two cases: 1. Markdown, where indentation can be irregular as well as meaningful. 2. Failing tests! The latter could prove rather difficult - getting your tests to pass under 7.2 and 7.3+ might be far from simple, and at the very least would require test-helpers that conditionally treat whitespace differently for 7.3+ and earlier versions. Even inline HTML could potentially suffer, if you have <pre> blocks. And on top of these unexpected results and test-failures, of course there may be parse errors for inline content with meaningful whitespace that was (or wasn't) indented correctly. Honestly, are there any cases where existing code *benefits* from changing the existing syntax/feature? Some people indent inline blocks so that the output ends up with the desired indentation, rather than the source-code looking pretty - in those cases, whitespace will now be silently removed and the output no longer as desired? Are we positive it wouldn't be safer to just introduce a slight syntax variation for blocks that treat indentation differently? (am I blowing this out of proportion?)