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A case study in incrementing a language's major version: PHP
--client
lca
--show
lca2019
--room a2 14525 --force
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Author(s):
Adam Harvey
Location
A2
Date
jan Thu 24
Days Raw Files
Start
14:25
First Raw Start
14:03
Duration
0:45:0
Offset
0:21:49
End
15:10
Last Raw End
15:26
Chapters
00:00
0:05:30
0:35:29
Total cuts_time
43 min.
https://2019.linux.conf.au/schedule/presentation/149/
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In 2015, the PHP project released version 7.0 of the PHP language. Doing so was the culmination of several years of discussion and hard work to resolve what a new major version would look like, what would be included, and most importantly, what would be broken for existing users. In the end, PHP 7 was released with almost no backward compatibility breaks for well written, modern PHP 5 code. As a result, uptake of PHP 7 after two years has been — depending on which source you use and how you measure it — between 33% and 67%. In this talk, I'll discuss how the PHP team balanced the carrot and the stick to encourage adoption, and compare how PHP's approach to a major version bump has contrasted with other languages in the recent past.
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