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

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ࣗݾ঺հ

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

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

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2020೥11݄26೔͸ Կͷ೔ʁ

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๻ͷ஀ੜ೔

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Ͱ͸ͳ͘

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PHP8ͷ஀ੜ೔ ʢϦϦʔε೔ʣ

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

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ͦͷલʹ Ξϯέʔτ

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

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

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PHP8ͷ৽ػೳ

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

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

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͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ʂ