Description
I'm just trying to confirm whether ob_gzhandler() is impacted by #18932.
ob_gzhandler() is documented to return string|false, and I cannot see any recent changes in ext/zlib/zlib.c which modify the handler to not return false in the case where the browser does not support gzip.
However in the testing I have tried to do, I am unable to trigger any deprecation notice.
It would be good to confirm, and document, that this method is safe to use with ob_start().
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