Lester Caine wrote on 07/12/2015 11:47:
Things are certainly heading in the right direction, but 5.2/3 is still only dropped bellow 50% in the last month, while PHP4 was well down when the actual EOL was proposed. 80% of people were using PHP5.2 in 2010 against 20% on PHP4, and that swung to 90/10 in 2011 mainly because PHP4 sites could be switched to PHP5.2 ... switching 5.2/3 sites to PHP7 is not so easy, but http://w3techs.com/technologies/history_details/pl-php/5/y probably shows the best picture, with people migrating to PHP5.4 as the next step ...
Bundling 5.2 and 5.3 into one bracket seems very odd to me. In my mind, the major upgrades are 4 to 5, 5.2 to 5.3 (which should have been 6.0), maybe 5.4 (for things like the call-time pass-by-reference cleanup), then plain sailing up to 5.6.
I would guess that delays in adopting 5.5 and 5.6 are probably more to do with package availability in enterprise Linux distros (and shared hosting), and a lack of killer features which people go out of their way to upgrade for, rather than the difficulty of adapting code. It's probably actually easier to make the business case for a 7.0 upgrade than a 5.6 one.
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