型を意識したPHPアプリケーション開発

2017/10/08 PHPカンファレンス2017 https://github.com/shin1x1/phpcon2017

Transcript

1. ܕΛҙࣝͨ͠
   1)1ΞϓϦέʔγϣϯ։ൃ ɹ!shin1x1 2017//08 phpcon 2017
2. https://php-genba.shin1x1.com/
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4. 1)1ͷܕγεςϜ
5. &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
6. &MPRVFOU 3FQPTJUPSZ echo 10 + 5, PHP_EOL; => 15 ୅਺ԋࢉࢠ͸
   JOU
   ܕͱ
   qPBU
   ܕ͕ର৅
   ҉໧తܕม׵
7. &MPRVFOU 3FQPTJUPSZ echo 10 + "5", PHP_EOL; => 15 TUSJOH
   ͕
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   ʹม׵͞ΕΔ
   ҉໧తܕม׵
8. &MPRVFOU 3FQPTJUPSZ echo 10 + "5e", PHP_EOL; => 15 ҉໧తܕม׵
9. &MPRVFOU 3FQPTJUPSZ echo 10 + "5e2", PHP_EOL; => ??? ҉໧తܕม׵
10. &MPRVFOU 3FQPTJUPSZ echo 10 + "5e2", PHP_EOL; => 510 ҉໧తܕม׵
11. &MPRVFOU 3FQPTJUPSZ 5e2 ʢ5=Ծ਺෦, 2=ࢦ਺෦, 10=ج਺ʣ => 5 * (10 ** 2) => 500 ˞ࢦ਺දه
12. &MPRVFOU 3FQPTJUPSZ <?php declare(strict_types=1); function double(int $i): int { return $i * 2; } double(1); // 2 double(“5e”); // TypeError ܕએݴ
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    !TIJOY %FNP https://github.com/shin1x1/phpcon2017
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19. &MPRVFOU 3FQPTJUPSZ // ܕએݴແ͠ function calculate($price, $taxRate) // υϝΠϯಛԽܕͰܕએݴ function calculate( Price $price, TaxRate $taxRate): PriceWithTax
20. υϝΠϯಛԽܕͷ࣮૷
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22. &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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25. &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); }
26. &MPRVFOU 3FQPTJUPSZ ϑΝΫτϦϝιου // float TaxRate::of(0.08); // int TaxRate::ofByInt(8);
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    Ͱܕݕࠪ https://github.com/phan/phan
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