型を意識したPHPアプリケーション開発

by shin1x1

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ܕΛҙࣝͨ͠ 1)1ΞϓϦέʔγϣϯ։ൃ ɹ!shin1x1 2017//08 phpcon 2017

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https://php-genba.shin1x1.com/

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D .BTBTIJ4IJOCBSB!TIJOY ΞδΣϯμ w1)1ͷܕγεςϜ wܕએݴΛར༻ͨ͠ίʔυ࣮૷ wυϝΠϯಛԽܕͷ࣮૷5JQT w͍͞͝ʹ

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1)1ͷܕγεςϜ

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&MPRVFOU 3FQPTJUPSZ $foo = 123; echo gettype($foo), PHP_EOL; => integer $foo = 'Hello'; echo gettype($foo), PHP_EOL; => string $foo = [1, 2, 3]; echo gettype($foo), PHP_EOL; => array ม਺͸ܕΛ࣋ͨͳ͍ɺ஋͕ܕΛ࣋ͭ

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&MPRVFOU 3FQPTJUPSZ echo 10 + 5, PHP_EOL; => 15 ୅਺ԋࢉࢠ͸JOUܕͱqPBUܕ͕ର৅ ҉໧తܕม׵

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&MPRVFOU 3FQPTJUPSZ echo 10 + "5", PHP_EOL; => 15 TUSJOH͕JOUʹม׵͞ΕΔ ҉໧తܕม׵

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&MPRVFOU 3FQPTJUPSZ echo 10 + "5e", PHP_EOL; => 15 ҉໧తܕม׵

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&MPRVFOU 3FQPTJUPSZ echo 10 + "5e2", PHP_EOL; => ??? ҉໧తܕม׵

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&MPRVFOU 3FQPTJUPSZ echo 10 + "5e2", PHP_EOL; => 510 ҉໧తܕม׵

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&MPRVFOU 3FQPTJUPSZ 5e2 ʢ5=Ծ਺෦, 2=ࢦ਺෦, 10=ج਺ʣ => 5 * (10 ** 2) => 500 ˞ࢦ਺දه

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&MPRVFOU 3FQPTJUPSZ

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D .BTBTIJ4IJOCBSB!TIJOY 1)1ͷܕγεςϜ w஋͕ܕΛ࣋ͭ w҉໧తܕม׵Ͱॊೈʹ։ൃ wܕએݴͰݫີʹ։ൃ wϢʔβ͕ελΠϧΛબ୒Ͱ͖Δ

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ܕΛ׆༻ͨ͠1)1ίʔυͷ࣮૷

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D .BTBTIJ4IJOCBSB!TIJOY FY੫ࠐΈՁ֨ͷࢉग़ w঎඼Ձ֨ ফඅ੫཰   খ਺఺ҎԼ͸੾Γࣺͯ w঎඼Ձ֨͸ਖ਼ͷ੔਺ wফඅ੫཰͸খ਺ͱ͢Δʢʣ

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D .BTBTIJ4IJOCBSB!TIJOY %FNP wܕએݴແ͠ wεΧϥʔܕͰܕએݴ wϢʔβఆٛܕͰܕએݴ

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D .BTBTIJ4IJOCBSB!TIJOY %FNP https://github.com/shin1x1/phpcon2017

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D .BTBTIJ4IJOCBSB!TIJOY υϝΠϯʹಛԽͨ͠ܕΛ࡞Δ wΞϓϦέʔγϣϯυϝΠϯΛදݱ wυϝΠϯϧʔϧΛݕূ wܕએݴʹΑΔදݱͱڧ੍

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&MPRVFOU 3FQPTJUPSZ // ܕએݴແ͠ function calculate($price, $taxRate) // υϝΠϯಛԽܕͰܕએݴ function calculate( Price $price, TaxRate $taxRate): PriceWithTax

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υϝΠϯಛԽܕͷ࣮૷5JQT

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D .BTBTIJ4IJOCBSB!TIJOY ҆қʹܧঝΛ࢖Θͳ͍ wܧঝݩΫϥεܕ΁ͷద߹Λ๷͙ wܧঝݩϝιουؚ͕·Εͯ͠·͏ wҕৡ΍τϨΠτͰڞ༗

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&MPRVFOU 3FQPTJUPSZ // ܧঝ final class PriceWithTax extends Price {} ܧঝ $price = PriceWithTaxCalculator::calculate($price, $taxRate); // PriceWithTax ΋ Price ܕͳͷͰಈ͍ͯ͠·͏ $price = PriceWithTaxCalculator::calculate($price, $taxRate);

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D .BTBTIJ4IJOCBSB!TIJOY Πϛϡʔλϒϧʹ͢Δͱ҆શ w׬શίϯετϥΫλ wෆม৚݅ݕূ͕Ұ౓ͰࡁΉ wϛϡʔλϒϧͳΒ౎౓ݕূ

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D .BTBTIJ4IJOCBSB!TIJOY ϑΝΫτϦϝιου wίϯετϥΫλΛQSJWBUF wϑΝΫτϦϝιου wҾ਺ʹΑΔόϦΤʔγϣϯ

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&MPRVFOU 3FQPTJUPSZ ϑΝΫτϦϝιου public static function of(float $value): self { return new self($value); } public static function ofByInt(int $value): self { return new self($value / 100); }

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&MPRVFOU 3FQPTJUPSZ ϑΝΫτϦϝιου // float TaxRate::of(0.08); // int TaxRate::ofByInt(8);

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D .BTBTIJ4IJOCBSB!TIJOY ։ൃͰͷܕݕࠪ wࣗಈςετ$* w1IQ4UPSN w1IBO

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D .BTBTIJ4IJOCBSB!TIJOY 1IQ4UPSN wΤσΟλ  ϦΞϧλΠϜͳνΣοΫ w*OTQFDU$PEFT  ϓϩδΣΫτશମΛҰׅνΣοΫ w6TBHFTPG  ܕͷར༻ҰཡΛྻڍ

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D .BTBTIJ4IJOCBSB!TIJOY 1IBO w1)1Ͱ࣮૷͞Εͨ$-*πʔϧ wܕෆҰக΍TUSJDUҧ൓ͳͲΛݕ஌ w$*Ͱܕݕࠪ https://github.com/phan/phan

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͍͞͝ʹ

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wܕએݴͰܕΛڧ੍ wυϝΠϯΛܕͰදݱ wܕͰؾ͍͍࣋ͪ։ൃΛ D .BTBTIJ4IJOCBSB!TIJOY ܕΛ׆༻ͨ͠։ൃ

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D .BTBTIJ4IJOCBSB!TIJOY !TIJOY !TIJOY D .BTBTIJ4IJOCBSB!TIJOY