本当の FizzBuzz をお見せします

懇親会 LT @ PHP カンファレンス 2023

※このスライドは懇親会 LT 用のネタであり「本当の FizzBuzz」なんてものは実在しません

Transcript

1. Ί΋Γʔ
   ຊ౰ͷ FizzBuzz Λ͓ݟͤ͠·͢
   ࠙਌ձ LT @PHP ΧϯϑΝϨϯε 2023
   
   

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2. Ί΋Γʔ
   m3m0r7
   ͖ͬ͞ RubyVM Λ PHP Ͱ࣮૷͢Δ࿩Λ͠
   ·ͨ͠
   
   memory1994
   m3m0r7
   

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3. 
   FizzBuzz ஌ͬͯΔਓʙʁ
   

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4. 
   ૝૾ͨ͠ਓ΋

   ͍ΔΜ͡Όͳ͍Ͱ͠ΐ͏͔
   

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5. 
   

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6. 
   FizzBuzz ͰϧʔϓจΛ

   ࢖͏ͷ͸؁͑
   

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7. 
   ຊ౰ͷ FizzBuzz Λݟͤͯ΍Γ·͢Α
   

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8. 
   

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9. 
   ͜ΕɼͪΌΜͱ 1 ʙ 100 ·Ͱͷ
   FizzBuzz ͕ग़ྗ͞Ε·͢
   

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10. 
    Ͳ͏ಈ͍͍ͯΔͱࢥ͍·͔͢ʁ
    

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11. 
    PHP ͸ $$var ͱ࣮ߦ͢Δͱ $var ʹ

    ೖ͍ͬͯΔ஋Λม਺໊ͱͯ͠ࢀর͠·͢
    

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12. 
    ͨͱ͑͹ $var = 'cat' ͱ͢Δͱ $$var
    ͸ $cat Λ࣮ߦ͠Α͏ͱ͠·͢ɻ
    

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13. 
    ͭ·Γɼ$$$...$ ͸ͦΕΛ

    ͻͨ͢Β܁Γฦ͍ͯ͠Δ͜ͱʹͳΓ·͢ɻ
    

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14. 
    $var = '1' Λ $$var ͱ͢Δͱ $1 Λ

    ࢀর͠Α͏ͱ͠·͕͢
    

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15. 
    ͝ଘ஌ͷ௨Γ PHP Ͱ͸

    ม਺໊Λ਺ࣈ͔Β࢝ΊΒΕ·ͤΜ
    

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16. 
    ͔͠͠ $GLOBALS['1'] ͷΑ͏ʹ

    ࢀর͢Δ͜ͱ͸Ͱ͖·͢
    

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17. 
    PHP ͸ϩʔΧϧม਺ͱάϩʔόϧม਺
    Ͱ͋Δ $GLOBALS Λࢀর͠Α͏ͱ͠
    ·͢
    

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18. 
    ͜ͷΑ͏ʹ͢Δ͜ͱͰ $var = '1' Λ
    $$var ͱ࣮ߦ͢Δͱ $GLOBALS['1'] ͕

    ࢀর͞Ε·͢
    

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19. 
    ͔͠͠ $GLOBALS['1'] ͸ηοτ͞Ε
    ͍ͯͳ͍ͷͰɼ͜ͷ··Ͱ͸
    Unde
    fi
    ned variable ʹͳΓ·͢
    

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20. 
    ࣮͸ $var = '1' Λ $$var ͱ࣮ߦ͢Δͱ͖
    Unde
    fi
    ned variable ͕ग़ྗ͞ΕΔલʹ

    จࣈྻม׵͕૸Γ·͢
    

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21. 
    ͭ·Γ class Ͱఆٛ͞Εͨ

    __toString ͕ൃՐ͢ΔͷͰ͢
    

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22. 
    ͜ͷੑ࣭Λར༻ͯ͠ɼ__toString ͷ

    λΠϛϯάͰ $GLOBALS['1'] ʢ1 ͸
    ೚ҙͷ਺ࣈʣΛఆ͍ٛͯ͠·͢
    

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23. 
    ͦͯ͠ __toString ͷฦΓ஋͸

    ม਺໊ͱͯ͠ѻΘΕ·͢
    

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24. 
    ͭ·Γ __toString Λ܁Γฦͨ͢ͼʹ
    1, 2, 3 ... ͱ૿͍͖͑ͯ·͢ɻ
    

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25. 
    ͦͷ஋Λ༻͍ͯ Fizz or Buzz or ਺ࣈ
    ͱग़͠෼͚Λߦ͍ग़ྗͤ͞Ε͹͍͍ͷ
    Ͱ͢
    

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26. 
    ͔͠͠ɼͦͷ··Ͱ͸ग़ྗͰ͖·ͤΜ
    

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27. 
    ͦͷͨΊ print Λ༻͍ͯ

    ग़ྗΛߦ͍ͬͯ·͢
    

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28. 
    ϫϯϥΠφʔϋοΫͰ͸ฦΓ஋͕ͳ͍
    echo ΑΓฦΓ஋͕͋Δ print ͕ॏๅ͠
    ·͢ʢͦͷ··ଞͷࣜʹࠞͥΒΕΔʣ
    

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29. 
    https://gist.githubusercontent.com/m3m0r7/
    f8059505046c6ab689aa728c2ca6f76c/raw/
    be78189cb305358cd57c5ab31c251dd2dcc656d1/
    fi
    zzbuzz.php
    

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30. 
    ͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠
    

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