あの日見たバグを僕達はまだ公式ドキュメントで見れない / The bug we saw that day

2017/01/31 PHP 勉強会 での LT 資料です

1. ୩ޱ
   ఓӳ
   
   !SBWFMMM ͋ͷ೔ݟͨόάͷৄࡉΛ
   ๻ୡ͸·ͩ
   ެࣜυΩϡϝϯτͰ
   ݟΕͳ͍
2. ࡢ೔ͷൃදʹͯ
3. ్த
   1)1
   ͷόάΛ౿Ή IUUQTTQFBLFSEFDLDPNHTUIFCVHXFTBXUIBUEBZ
4. ͦͷ࿩Λ͠·͢
5. ୩ޱ
   ఓӳ
   @ravelll
6. w
   ΞϓϦέʔγϣϯͷػೳ։ൃ
   w
   ΞϓϦέʔγϣϯج൫ͷอक
   w
   ։ൃج൫ͷվળ &$ج൫νʔϜ Χϥʔϛʔγϣοϓάϧʔϓ
7. ͋Εͬ
   ͜ͷػೳಈ͔ͳ͍ʜ wϖʔδʹΞΫηεͨ͠ΒඇಉظʹσʔλΛऔಘɾඳը
   w"KBY
   Ͱ
   (&5
   ͯ͠
   KTPO
   ड͚औͬͯඳը
   wKTPO
   औಘ࣌ʹ
   1)1
   ଆͰΤϥʔ͕ग़͍ͯͨ
   •PHP Warning: mb_convert_variables(): Cannot handle recursive references in ʙ
8. 1)1ͷόʔδϣϯΞοϓΛ΍͍ͬͯͨ w͋Δ
   8FC
   ΞϓϦέʔγϣϯͷϩʔϧ
   $ wc -l $(find . -name \*.php) | tail -1 
 325048 total w1)1
   
   
   1)1
    wίʔυमਖ਼͕΄΅΄΅׬ྃɺಈ࡞ݕূΛ͍ͯͨ͠
9. ͋Εͬ
   ͜ͷػೳಈ͔ͳ͍ʜ wϖʔδʹΞΫηεͨ͠ΒඇಉظʹσʔλΛऔಘɾඳը
   w"KBY
   Ͱ
   (&5
   ͯ͠
   KTPO
   ड͚औͬͯඳը
   wKTPO
   औಘ࣌ʹ
   1)1
   ଆͰΤϥʔ͕ग़͍ͯͨ
   •PHP Warning: mb_convert_variables(): Cannot handle recursive references in ʙ
10. mb_convert_variables()
11. NC@DPOWFSU@WBSJBCMFT
    ͱ͸ʁ w
    ม਺ͷ஋ͷΤϯίʔσΟϯάΛม׵͢Δؔ਺
    ex) mb_convert_variables(‘UTF-8’, ’EUC-JP’, $var); w
    $var
    ʹ͸
    4USJOH
    "SSBZ
    0CKFDU
    Λ౉ͤΔ
    w
    NC@DPOWFSU@FODPEJOH
    ͱҾ਺ͷॱ͕ҧ͏ʢ͔Θ͍͍ʣ
    mb_convert_variables($to_enc, $from_enc, $var); mb_convert_encoding($str, $to_enc[, $from_enc]);
12. Cannot handle recursive references in …
13. Cannot handle recursive references in …
14. SFDVSTJWF
    ͳ
    SFGFSFODFTʁ
15. w
    ͦΜͳ഑ྻ͸౉͍ͯ͠ͳ͍ͧʜʁ
    w
    ͱ͍͏͔ [‘a’, ‘b’] Ͱ͢Βಉ͡ΤϥʔʹͳΔͧʁʁʁ
    ‎
    Ͳ͔͜ͷόʔδϣϯͰ࢓༷͕มΘͬͨʹҧ͍ͳ͍ʂ

    
    
    ެࣜυΩϡϝϯτΛಡ΋͏ʂʂ
17. ಛʹݴٴ͞Εͯͳ͍
18. ΢ʔϜࠔͬͨʜ w
    όʔδϣϯΞοϓલޙͰ
    1)1
    ͷιʔεΛಡΈൺ΂ͯΈͨ΋ͷͷ

    $
    ݴޠྗ͕௿ͯ͘࠶ؼࢀরΛݕ஌͢Δ࢓૊Έ͕૿͑ͯΔ͜ͱҎ֎Α ͘෼͔Βͳ͍ʜ
    w
    NC@DPOWFSU@FODPEJOH
    ؔ਺Λ࢖͏Α͏ʹΞϓϦέʔγϣϯͷ࣮૷ Λ௚͍͔ͯ͘͠͠ͳ͍ͷ͔ʜ͍΍Ͱ΋݁ߏ࢖ͬͯΔͱ͜Ζ͋Δʜ
21. Ξοοο
22. ؔ਺ͷόάͩͬͨ໛༷ ‣
    ୈҾ਺ʢม׵ݩͷΤϯίʔσΟϯάʣʹͭҎ্ͷΤϯίʔσΟϯ άΛࢦఆͨ͠ͱ͖ɺม׵ର৅ͷ
    "SSBZ
    ͷ࠶ؼతࢀরͷݕ͕ࠪਖ਼ৗʹ Ͱ͖ͳ͍
    ex) mb_convert_variables(‘UTF-8’, ‘EUC-JP,Shift_JIS’, $val); mb_convert_variables(‘UTF-8’, ‘auto’, $val); (‘auto’ ͸ΤΠϦΞεͰɺmbstring.language=Japanese
 ͷͱ͖ͳΒ ‘ASCII,JIS,UTF-8,EUC-JP,SJIS’)
23. मਖ਼ϓϧϦΫग़ͯͨʢʣ ‣
    ·͞ʹɺͳςετ͕௥Ճ͞Ε͍ͯͨʜʂ
24. ରԠ w
    όά͕ੜ·ΕΔ௚લͷόʔδϣϯʢʣΛ࢖͏͜ͱʹͨ͠
    w
    ΋͏
    1)1
    
    ܥ΋
    "DUJWF
    4VQQPSU
    Ͱͳ͘ͳΓେ͖ͳػೳ௥ Ճ͕ͳ͍
    w
    ࠓؤுͬͯ
    
    ͱ͔ʹ͢ΔΑΓ͸
    9
    ʹ͢΂͘ؤுͬͨ ΄͏͕Α͍ͷͰ͸ʜʁ
25. ·ͱΊ w
    όʔδϣϯΞοϓதʹݴޠͷόάͱग़ձͬͨ࿩Λڞ༗͠·ͨ͠
    w
    NC@DPOWFSU@WBSJBCMFT
    ͰϋϚͬͨ
    w
    ݪҼ͕υΩϡϝϯτʹॻ͔Εͯͳ͔ͬͨ
 ʢݴٴͨ͠Ϣʔβίϝϯτ͸͋ͬͨʣ
    w
    ؔ਺ࣗମʹόά͕͋Δ͜ͱ͕෼͔ͬͨ
    w
    1)1
    
    Λ࢖͏͜ͱͰҰ୴ճආͨ͠
26. ͦͷޙ
27. 
    ϩʔϧͷશ୆͕
    1)1
    
    ʹ
    w࠷ॳͷ
    13
    Λग़͔ͯ͠Βϱ݄
    wରԠʹग़ͨ͠
    13
    㲈
    
    ݸ
28. ύϑΥʔϚϯε
33. MPPLT
    ͍͍͡ΌΜ wϐʔΫ࣌ͷϨεϙϯελΠϜ͕๲Εͳ͘ͳͬͨ
    wϝϞϦফඅ૿
    w1)1
    
    ʹظ଴
34. ·ͱΊ w
    1)1
    
    
    
    ʹόʔδϣϯΞοϓͨ͠
    w
    εϧʔϓοτ͕޲্͢Δ͜ͱ͸΄ͱΜͲͳ͔ͬͨ
    w
    ϐʔΫλΠϜͷϨεϙϯε஗Ԇ͕ղফ͞Εͨ