PHP8をざっくり解説してみる

Transcript

1. PHP8Λͬ͘͟Γղઆͯ͠ΈΔ
   2021/1/22 WebφΠτٶ࡚ vol.12
   େ௩ਅݴ
   

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2. ࣗݾ঺հ
   

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3. ࣗݾ঺հ
   -BSBWFM
   7VFKT
   'JSFCBTF
   α΢φେ޷͖ͳ8FCΤϯδχΞ
   

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4. ձࣾ঺հ
   ߹ಉձࣾϊϚυϦ
   ૑ۀظ໨
   ϝϯόʔ໊
   8FCαʔϏε։ൃ
   &$αΠτ։ൃ
   

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5. 2020೥11݄26೔͸
   Կͷ೔ʁ
   

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6. ๻ͷ஀ੜ೔
   

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7. Ͱ͸ͳ͘
   

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8. PHP8ͷ஀ੜ೔
   ʢϦϦʔε೔ʣ
   
   
   
   
   
   
   
   
   
   
   

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9. ओͳมߋ఺
   • JITίϯύΠϧʹΑΔੑೳվળ
   • Nullsafeԋࢉࢠʢψϧ҆શΦϖϨʔλʣ
   • Unionܕ
   • Matchࣜ
   • ଞʹ΋ଟ਺
   

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10. ͦͷલʹ
    Ξϯέʔτ
    

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11. ͲͷόʔδϣϯΛ࢖ͬͯΔʁ
    1. PHP 5.x
    2. PHP 7.0ʙ7.2
    3. PHP 7.3ʙ7.4
    4. PHP 8.0
    

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12. 
    
    
    
    
    
    
    
    
    
    
    ҎԼ
    7.4
    7.3
    7.2
    7.0-7.1
    5.6
    5.5ҎԼ
    IUUQTXUFDITDPNUFDIOPMPHJFTEFUBJMTQMQIQ
    όʔδϣϯ͝ͱͷ࢖༻཰
    

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13. PHP8ͷ৽ػೳ
    

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14. JITίϯύΠϧ
    • JITʢJust-in-Time Compilerʣ˞࣮ߦ࣌ίϯύΠϥ
    • ίʔυΛϝϞϦʔʹΩϟογϡ͢ΔOPCacheͱซ༻
    • ωΠςΟϒίʔυΛϝϞϦʔʹΩϟογϡ͢Δ͜ͱͰϓϩ
    άϥϜ࣮ߦΛߴ଎Խ
    • ΞϧΰϦζϜܥॲཧͰ͸2~3ഒఔ౓࣮ߦ଎౓͸޲্͕ͨ͠ɺ
    WordPressͳͲͷWebΞϓϦέʔγϣϯͰ͸਺%ఔ౓͔͠
    ޲্͠ͳ͍
    

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15. Nullsafeԋࢉࢠ
    DPVOUSZOVMM
    JG TFTTJPOOVMM
    \
    VTFSTFTTJPOVTFS
    JG VTFSOVMM
    \
    BEESFTTVTFSHFU"EESFTT
    
    
    JG BEESFTTOVMM
    \
    DPVOUSZBEESFTTDPVOUSZ
    ^
    ^
    ^
    DPVOUSZTFTTJPO VTFS HFU"EESFTT
    DPVOUSZ
    1)1
    1)1
    ifจʹΑΔnullνΣοΫ͕ෆཁʹͳΔ
    

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16. Unionܕ
    
    !QBSBNqPBUcJOUOVNCFS
    
    QVCMJDGVODUJPOTBNQMF OVNCFS
    \
    FDIPOVNCFS
    ^
    UIJTTBNQMF UFHFIPHF
    ࣮ߦՄೳ
    QVCMJDGVODUJPOTBNQMF qPBUcJOUOVNCFS
    \
    FDIPOVNCFS
    ^
    UIJTTBNQMF UFHFIPHF
    ࣮ߦΤϥʔ
    1)1
    1)1
    ࣮ߦ࣌ʹUnionܕͷܕνΣοΫ͕Ͱ͖Δ
    1)1Ͱ͸Ξϊςʔγϣϯ
    ʹΑΔิ׬
    

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17. Matchࣜ
    TXJUDI
    \
    DBTF
    SFTVMU0IOP
    CSFBL
    DBTF
    SFTVMU5IJTJTXIBU*FYQFDUFE
    CSFBL
    ^
    FDIPSFTVMU
    0IOP
    FDIPNBUDI
    \
    0IOP
    5IJTJTXIBU*FYQFDUFE
    ^
    5IJTJTXIBU*FYQFDUFE
    1)1
    1)1
    ݫີͳൺֱɺbreakจ͕ෆཁ
    

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18. ·ͱΊ
    • JITίϯύΠϧ͕ಋೖ͞Ε͕ͨɺ࣮ӡ༻ͷWebΞ
    ϓϦ΁ͷੑೳ޲্͸͋·Γظ଴Ͱ͖ͳ͍
    • Matchࣜ΍NullsafeԋࢉࢠΛ࢖͏͜ͱͰεϦϜ
    ͳίʔυΛॻ͚Δ
    • Unionܕ͕௥Ճ͞ΕɺܕγεςϜ͕ΑΓڧݻʹ
    ͳͬͨ
    

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19. ͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ʂ
    

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