Contributing Advent 9: Day of the week
This is another one in the Date/Time extension series. Bugs #63391 and #61599 both deal with PHP getting the Day of Week wrong in years before 1600. Technically I did not write the patch for this contribution, but I did add tests, verified it and merged it to all the four branches (PHP 5.4, 5.5, 5.6 and master).
However, it does seem that I introduced the bug in the first place. When writing the new date/time support about 7 years ago I was looking for an algorithm that would tell me the day of the week for any given (Gregorian calendar) date. Wikipedia has quite a good article on it. The article outlines the calculation of the century number. For the Gregorian calendar, that's quite straight forwards: 6 - (j % 4) * 2. For the Julian calendar it's not very difficult either. Although PHP uses the proleptic Gregorian calendar that I wrote about before, I mistakenly had used a formula that combined the Julian and Gregorian calendar calculations. This then resulted in wrong calculations before the year 1600. This is now corrected and ready for inclusion into PHP 5.4.24, 5.5.7, and later versions.
Life Line
Updated a pub
Merged pull request #1065
Comparison whether class is userland or internal used the wrong macro
PHP 8.6: zend_enum.h now mixes code with declarations
PHP 8.6: Argument names are now stored as zend_strings
Updated a bench and a waste_basket
I walked 8.3km in 1h25m37s
Created a recycling
I walked 10.5km in 1h46m57s
An interesting journey in story form, showing how English changed over time.
https://www.deadlanguagesociety.com/p/how-far-back-in-time-understand-english
A much better writer than I is summing up perfectly why I have such disdain for Generative AI/LLMs.
https://jonn.substack.com/p/so-why-do-i-feel-so-angry-about-this
Created a waste_basket; Updated a waste_basket; Deleted a bench
Created a bench; Updated 7 benches and a gate; Deleted 2 benches and a gate
Created 10 benches and 2 waste_baskets; Updated an information
Created a bench; Updated 2 benches; Deleted a bench
I hiked 18.1km in 3h17m10s
I walked 3.0km in 25m12s
Updated a restaurant
I walked 4.6km in 34m18s
I walked 0.7km in 5m33s
Updated a restaurant
Updated a pub
I walked 12.3km in 2h11m46s
Shortlink
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