５分で「へぇ〜」がひとつ増える、ＰＨＰの”気になる”関数の話

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1. ̑෼Ͱʮ΁͐ʙʯ͕ ͻͱͭ૿͑Δɺ̥̝̥ ͷ"ؾʹͳΔؔ਺"ͷ࿩ ͖ͨΌ͸͠ @takahashiyuya - PHPΧϯϑΝϨϯε෱Ԭ2025
2. ɹɹಈػɿPHPͷ࿩͕͍ͨ͠ ໨ඪɿ̍΁͐ʙҎ্ ɹɹɹɹൃදɿΏΔָ͘͠ΜͰ΄͍͠
3. ɹɹ͖ͨΌ͸͠ @takahashiyuya • גࣜձࣾϏοτϑΥϨετʢ݄̓ೖࣾʣ • VAddy ςΫχΧϧαϙʔτΤϯδχΞ • ޷͖ͳ෱Ԭͷϥʔϝϯʮ໙԰զΨ খ܊ຊళʯ
4. ͍͖ͳΓຊ೔ͷओ໾ օ༷ɺഥखͰ͓ܴ͍͑ͩ͘͞
5. date_sun_info()
6. ஌ͬͯΔ͚Ͳɺ஌Βͳ͍ɻ ͦΜͳؔ਺ʢॾઆ͋Γʣ
7. ΁͐ʙ͍ͭͰʹ ஌ͬͯΔ ʹͳ͍ͬͯͨͩͭ͘΋Γ
8. ͜ͷؔ਺ΛޠΔલʹ…
9. 🌅date_sunrise() 🌆date_sunset()
10. date_sunrise() ɾ date_sunset() • ೔ͷग़ɾ೔ͷೖΓͷ࣌ࠁ͕औಘͰ͖Δɻ
11. ͜ΕͰΑ͘ͳ͍ʁ
12. Α͘ͳ͍
13. ؔ਺ఆٛ date_sunrise( int $timestamp, int $returnFormat = SUNFUNCS_RET_STRING, ?float $latitude = null, ?float $longitude = null, ?float $zenith = null, ?float $utcOffset = null ): string|int|float|false
14. ੺ࣈ͸Α͘ͳ͍ͱ͜Ζ date_sunrise( int $timestamp, int $returnFormat = SUNFUNCS_RET_STRING, ?float $latitude = null, ?float $longitude = null, ?float $zenith = null, ?float $utcOffset = null ): string|int|float|false
15. ΄ͱΜͲΑ͘ͳ͍
16. Α͘ͳ͔ͬͨϙΠϯτ • Ҿ਺Ͱ໭Γ஋ͷܕ͕มΘΔ • λΠϜκʔϯ͕ಠཱ͍ͯ͠Δ • ఱ௖֯Λखೖྗ͢Δඞཁ͕͋Δ • Ң౓ܦ౓͕লུͰ͖Δʢʁʣ
17. Ҿ਺Ͱ໭Γ஋ͷܕ͕มΘΔ • ୈೋҾ਺ $returnFormat • औಘ͢Δ࣌ࠁͷϑΥʔϚοτม͑Δ • ໭Γ஋Λ string | fl oat | int ͰͦΕͧΕࢦఆͰ͖Δ • ·͔͞ͷୈೋҾ਺
18. λΠϜκʔϯ͕ಠཱ͍ͯ͠Δ • ୈ࿡Ҿ਺ $utcOffset • ಺෦తʹઃఆͨ͠λΠϜκʔϯͱؔ܎ͳ͍ • σϑΥϧτ஋͕UTCج४(+0) • ͭ·ΓੈքதͰࢦఆඞਢͳୈ࿡Ҿ਺͕ര஀ 🆕
19. ఱ௖֯Λखೖྗ͢Δඞཁ͕͋Δ • $zenith • `ଠཅͷத৺ͱɺ஍ٿͷද໘͔Βͷਨઢͷؒʹͳ֯͢౓Ͱ͢ɻ` • ઐ໳ੑ͕ߴ͍஋ʹ΋ؔΘΒͣखೖྗ • ʮαΠτʹΑ͕ͬͯ࣌ؒҧ͏ʯͱ͍͏ࠞཚ͕ੈքதͰى͖ͨ
20. Ң౓ܦ౓͕লུͰ͖Δʢʁʣ • Ͳ͔͜ͷ೔ͷग़ɾ೔ͷೖΓΛ஌Γ͍ͨͷͰ͸ʁ • লུ͢ΔͱɺσϑΥϧτͷҢ౓ܦ౓ͱ͍͏Ṗͷ஋Ͱॲཧ͞ΕΔ • Ṗͷ஋ɿ31.7667, 35.2333
21. ❓PHPΫΠζ❓ σϑΥϧτͷҢ౓ܦ౓͸Ͳ͜ʁ Ṗͷ஋ɿ31.7667, 35.2333
23. ਖ਼ղ͸ ΠεϥΤϧ🇮🇱
24. ͳΜͰ 🇮🇱ʁʁʁ
25. PHPΛ ։ൃ Zeev͞ΜɹAndi͞Μ ͷ ஍ݩ
26. ·ͨ Zend ͸… Zeev + Andi ͓ೋਓͷ໊લ͕༝དྷͰ͢
27. ༨ஊσϑΥϧτҢ౓ܦ౓
28. Α͘ͳ͔ͬͨϙΠϯτ • Ҿ਺Ͱ໭Γ஋ͷܕ͕มΘΔ • λΠϜκʔϯ͕ಠཱ͍ͯ͠Δ • ఱ௖֯Λखೖྗ͢Δඞཁ͕͋Δ • Ң౓ܦ౓͕লུͰ͖Δʢʁʣ
29. ղܾ͍ͨ͠
30. Ͳ͏΍ͬͯʁʁ
31. ΋ͪΖΜؔ਺Ͱ👍
32. date_sun_info()
33. ੜ·ΕมΘͬͨؔ਺ఆٛ date_sun_info( int $timestamp, float $latitude, float $longitude ): array
34. ໭Γ஋ array shape type array(9) { ["sunrise"] => ೔ͷग़ (ఱ௖֯ = 90°50′) ["sunset"] => ೔ͷೖΓ (ఱ௖֯ = 90°35′) ["transit"] => ଠཅ͕࠷΋ߴ͘ͳΔ࣌ࠁʢೆதʣ ["civil_twilight_begin"] => ໷໌͚ʢࢢຽബ໌ͷ։࢝, ఱ௖֯ = 96°ʣ ["civil_twilight_end"] => ༦฻Εʢࢢຽബ໌ͷऴྃ, ఱ௖֯ = 96°ʣ ["nautical_twilight_begin"] => ߤւബ໌ͷ։࢝ (ఱ௖֯ = 102°) ["nautical_twilight_end"] => ߤւബ໌ͷऴྃ (ఱ௖֯ = 102°) ["astronomical_twilight_begin"] => ఱจബ໌ͷ։࢝ (ఱ௖֯ = 108°) ["astronomical_twilight_end"] => ఱจബ໌ͷऴྃ (ఱ௖֯ = 108°) }
35. Α͘ͳ͔ͬͨϙΠϯτ • Ҿ਺Ͱ໭Γ஋ͷܕ͕มΘΔ • λΠϜκʔϯ͕ಠཱ͍ͯ͠Δ • ఱ௖֯Λखೖྗ͢Δඞཁ͕͋Δ • Ң౓ܦ౓͕লུͰ͖Δʢʁʣ
36. ੜ·ΕมΘͬͨؔ਺ఆٛ date_sun_info( int $timestamp, float $latitude, float $longitude ): array
37. Α͘ͳ͔ͬͨϙΠϯτ • ✔ Ҿ਺Ͱ໭Γ஋ͷܕ͕มΘΔ • λΠϜκʔϯ͕ಠཱ͍ͯ͠Δ • ఱ௖֯Λखೖྗ͢Δඞཁ͕͋Δ • Ң౓ܦ౓͕লུͰ͖Δʢʁʣ
38. ੜ·ΕมΘͬͨؔ਺ఆٛ date_sun_info( int $timestamp, float $latitude, float $longitude ): array
39. Α͘ͳ͔ͬͨϙΠϯτ • ✔ Ҿ਺Ͱ໭Γ஋ͷܕ͕มΘΔ • ✔ λΠϜκʔϯ͕ಠཱ͍ͯ͠Δ • ఱ௖֯Λखೖྗ͢Δඞཁ͕͋Δ • Ң౓ܦ౓͕লུͰ͖Δʢʁʣ
40. ໭Γ஋ array shape type array(9) { ["sunrise"] => ೔ͷग़ (ఱ௖֯ = 90°50′) ["sunset"] => ೔ͷೖΓ (ఱ௖֯ = 90°35′) ["transit"] => ଠཅ͕࠷΋ߴ͘ͳΔ࣌ࠁʢೆதʣ ["civil_twilight_begin"] => ໷໌͚ʢࢢຽബ໌ͷ։࢝, ఱ௖֯ = 96°ʣ ["civil_twilight_end"] => ༦฻Εʢࢢຽബ໌ͷऴྃ, ఱ௖֯ = 96°ʣ ["nautical_twilight_begin"] => ߤւബ໌ͷ։࢝ (ఱ௖֯ = 102°) ["nautical_twilight_end"] => ߤւബ໌ͷऴྃ (ఱ௖֯ = 102°) ["astronomical_twilight_begin"] => ఱจബ໌ͷ։࢝ (ఱ௖֯ = 108°) ["astronomical_twilight_end"] => ఱจബ໌ͷऴྃ (ఱ௖֯ = 108°) }
41. Α͘ͳ͔ͬͨϙΠϯτ • ✔ Ҿ਺Ͱ໭Γ஋ͷܕ͕มΘΔ • ✔ λΠϜκʔϯ͕ಠཱ͍ͯ͠Δ • ✔ ఱ௖֯Λखೖྗ͢Δඞཁ͕͋Δ • Ң౓ܦ౓͕লུͰ͖Δʢʁʣ
42. ੜ·ΕมΘͬͨؔ਺ఆٛ date_sun_info( int $timestamp, float $latitude, float $longitude ): array
43. Α͘ͳ͔ͬͨϙΠϯτ • ✔ Ҿ਺Ͱ໭Γ஋ͷܕ͕มΘΔ • ✔ λΠϜκʔϯ͕ಠཱ͍ͯ͠Δ • ✔ ఱ௖֯Λखೖྗ͢Δඞཁ͕͋Δ • ✔ Ң౓ܦ౓͕লུͰ͖Δʢʁʣ
44. ✔ Α͘ͳ͔ͬͨϙΠϯτ • ✔ Ҿ਺Ͱ໭Γ஋ͷܕ͕มΘΔ • ✔ λΠϜκʔϯ͕ಠཱ͍ͯ͠Δ • ✔ ఱ௖֯Λखೖྗ͢Δඞཁ͕͋Δ • ✔ Ң౓ܦ౓͕লུͰ͖Δʢʁʣ
45. ✔ ׬શղܾ
46. PHP5.1.0ͰϦϦʔε🎉
47. ΊͰͨ͠ΊͰͨ͠
48. …
49. ❓PHPΫΠζ❓ ϦϦʔεޙɺdate_sun_info()Λ ऻͬͨग़དྷࣄͱ͸Կʁ
51. Latitude and longitude are backwards in date-sun-info
52. date_sun_info() ͷ Ң౓ͱܦ౓͕ٯͰ͢
53. ౴͑͸ Ң౓ͱܦ౓͕ٯʹ ॲཧ͞Ε͍ͯͨ💥
54. ͦΜͳ͜ͱ͋ΔΜͩͳ͊
55. date_sun_info() Λ̑෼લΑΓ ஌ͬͯΔʹͳΕͨͰ͠ΐ͏͔ʁ
56. ͱΓ͋͑ͣಈ͔ͤΔ ͦͷͨΊͷศརͳؔ਺͕͋Δ ࣗ෼ʹͱͬͯɺͦΕ͕PHPΒ͠͞
57. ͋Γ͕ͱ͏ PHPΧϯϑΝϨϯε෱Ԭ
58. ͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ ʮ΁͐ʙʯͷ෼͚ͩഥखΡʙʙʙ👏
59. ࢀরɿhttps://github.com/php/php-src/blob/php-8.4.14/ext/date/php_date.c#L247-L248 🇮🇱 ·͓ͩΔͰʙ