DDDパターンを活用した Laravelアプリケーション開発/ddd-with-laravel

2016/10/29 Laravel Osaka 2016 http://php-jp.github.io/laravel-osaka-2016/

1. ɹ!shin1x1 2016//29 LBSBWFM
   0TBLB
    %%%ύλʔϯΛ׆༻ͨ͠
   -BSBWFMΞϓϦέʔγϣϯ։ൃ
2. ର৅γεςϜ
 Ϣʔεέʔε
3. &$αΠτ
   ΧʔτʹೖΕΔ
4. %%%
5. D
   
   .BTBTIJ
   4IJOCBSB
   !TIJOY %PNBJO
   %SJWFO
   %FTJHO wʮΤϦοΫɾΤϰΝϯεͷυϝΠϯۦಈઃܭʯ
   w
   υϝΠϯʹϑΥʔΧεͨ͠ઃܭɺ։ൃख๏
   w
   ଟ͘ͷύλʔϯ͕঺հ͞Ε͍ͯΔ
6. D
   
   .BTBTIJ
   4IJOCBSB
   !TIJOY ιϑτ΢ΣΞͷυϝΠϯ w
   γεςϜͷର৅ྖҬɺղܾ͢Δ໰୊ྖҬ
   w
   ۀ຿γεςϜͰ͋Ε͹ɺ

   
   
   ର৅ͷϏδωε͕υϝΠϯ
   w
   ιʔείʔυ؅ཧγεςϜͰ͋Ε͹ɺ

   
   
   ιϑτ΢ΣΞ։ൃ͕υϝΠϯ
   w
   ຊηογϣϯͰ͸ɺ&$αΠτ͕υϝΠϯ
7. ϢϏΩλεݴޠ
8. ϢϏΩλεݴޠ D
   
   .BTBTIJ
   4IJOCBSB
   !TIJOY w
   υϝΠϯ༻ޠࣙॻ

   
   
   
   ঎඼ɺΧʔτɺΧʔτʹ঎඼ΛೖΕΔɺͳͲ
   w
   ϓϩδΣΫτνʔϜ಺Ͱಉ͡ݴ༿Λར༻

   
   
   
   ։ൃऀ΋ϏδωεΤΩεύʔτ΋શһ
   w
   ͦͷݴ༿ΛίʔυͰ΋ར༻

   
   ʢ໊લۭؒɺΫϥεɺϝιου౳ʣ
9. ӳޠ ಺༰ ঎඼ *UFN ൢച͢Δ঎඼ɻԼهͷଐੑΛ࣋ͭɻ
 ɾ঎඼*%
   ɾ঎඼໊
 ɾ঎඼Ձ֨
 ɾࡏݿ ঎඼*% *UFN*E ঎඼Λࣝผ͢Δίʔυ
 ঎඼͝ͱʹҰҙ ঎඼໊ *UFN/BNF ঎඼ͷ໊শ ঎඼Ձ֨ *UFN1SJDF ঎඼ͷൢചՁ֨
 Ҏ্ͷ੔਺ ࡏݿ *UFN4UPDL ঎඼ͷࡏݿ਺
   Ҏ্ͷ੔਺
10. ӳޠ ಺༰ Χʔτ $BSU ߪೖ͢Δ঎඼ΛҰ࣌֨ೲ͢ΔೖΕ෺
 ΧʔτཁૉΛෳ਺࣋ͭ Χʔτཁૉ $BSU&MFNFOU Χʔτʹ֨ೲ͞Ε͍ͯΔཁૉ
 ঎඼໊ͱ঎඼ݸ਺Λଐੑʹ࣋ͭ ঎඼ݸ਺ *UFN$PVOU ঎඼ͷݸ਺ɻҎ্ͷ੔਺ɻ Χʔτʹ঎඼Λ ೖΕΔ "EE*UFN5P$BSU Χʔτʹ঎඼ΛೖΕΔ͜ͱɻ
 ঎඼ͱ঎඼ݸ਺Λ༩͑Δɻ
 ঎඼ݸ਺͸঎඼ࡏݿҎԼͰ͋Δඞཁ ͕͋Δɻ
11. D
    
    .BTBTIJ
    4IJOCBSB
    !TIJOY ΧʔτʹೖΕΔ"1* 
    1045ϦΫΤετ͔Β঎඼*%ͱ঎඼ݸ਺Λऔಘ
    
    σʔλϕʔε͔Β঎඼*%Ͱ঎඼Λऔಘ
    
    Χʔτʹ঎඼ΛೖΕΔ
    
    ΧʔτΛηογϣϯʹอଘ
    
    ϨεϙϯεΛฦ͢
12. ϨΠϠʔυ
    ΞʔΩςΫνϟ
13. ϨΠϠʔυΞʔΩςΫνϟ D
    
    .BTBTIJ
    4IJOCBSB
    !TIJOY w
    γεςϜΛϨΠϠʢ૚ʣʹ෼ׂ
    w
    ϨΠϠ͸ࣗ਎ͷ໾ׂΛ୲͏
    w
    ϨΠϠؒͰڠௐͯ͠ɺॲཧΛߦ͏
    w
    ϨΠϠؒͷྲྀΕ͸Ұํ௨ߦ
14. %%%
    
    &SJD
    &WBOT D
    
    .BTBTIJ
    4IJOCBSB
    !TIJOY UI Application Infrastructure Domain
15. D
    
    .BTBTIJ
    4IJOCBSB
    !TIJOY 6*
    -BZFS w
    Ϣʔβʢ࿈ܞγεςϜؚΉʣͱγεςϜͷ઀఺
    w
    Ϣʔβ͸͜ͷϨΠϠΛ௨ͯ͡γεςϜʹ৮ΕΔ
    w
    )551
    )5.-
    +40/
    45%*/
    45%065
    w
    Ϗϡʔɺ3FRVFTUɺ3FTQPOTF
16. ඞཁ࠷௿ݶ͚ͩར༻ ͪ͜Βʹ࣮૷
17. ΞϓϦέʔγϣϯ υϝΠϯ ΠϯϑϥετϥΫνϟ
18. ϨΠϠؒͷྲྀΕ D
    
    .BTBTIJ
    4IJOCBSB
    !TIJOY UI Application Infrastructure Domain
19. υϝΠϯϨΠϠ
20. D
    
    .BTBTIJ
    4IJOCBSB
    !TIJOY ΧʔτʹೖΕΔ"1* 
    1045ϦΫΤετ͔Β঎඼*%ͱ঎඼ݸ਺Λऔಘ
    
    σʔλϕʔε͔Β঎඼*%Ͱ঎඼Λऔಘ
    
    Χʔτʹ঎඼ΛೖΕΔ
    
    ΧʔτΛηογϣϯʹอଘ
    
    ϨεϙϯεΛฦ͢
21. D
    
    .BTBTIJ
    4IJOCBSB
    !TIJOY υϝΠϯϨΠϠ w
    γεςϜͷυϝΠϯΛ࣮૷͢ΔϨΠϠ
    w
    υϝΠϯҎ֎ͷؔ৺ࣄ͸ؚΊͳ͍

    
    
    
    )551
    
    %#
    
    Ωϟογϡ౳
    w
    1010
    Ͱ࣮૷͠ɺϑϨʔϜϫʔΫ͔Β͸ಠཱ

    
    
    
    'BDBEF
    ΍ϔϧύʔؔ਺΋࢖Θͳ͍
    w
    ϞσϧɺαʔϏεɺΠϕϯτͳͲ
22. D
    
    .BTBTIJ
    4IJOCBSB
    !TIJOY ΤϯςΟςΟ w
    υϝΠϯϞσϧͷ࣮૷

    
    
    
    ঎඼ɺΧʔτ
    w
    &MPRVFOU
    Λܧঝ͠ͳ͍
    w
    ಉҰੑ͸ࣝผࢠʢJEʣͰ൑ผ
    w
    ϛϡʔλϒϧ
23. D
    
    .BTBTIJ
    4IJOCBSB
    !TIJOY 7BMVF0CKFDU w
    Ձ֨΍೔෇ͳͲϓϦϛςΟϒͳ஋Λࣔ͢

    
    
    
    ঎඼*%ɺ঎඼Ձ֨ɺࡏݿ
    w
    ಉҰੑ͸ଐੑͰ൑ผ
    w
    ஋ʹର͢Δ੍໿΍ৼΔ෣͍ʢԋࢉʣΛ࣮૷
    w
    Πϛϡʔλϒϧ
24. D
    
    .BTBTIJ
    4IJOCBSB
    !TIJOY ঎඼ΤϯςΟςΟ ঎඼ΤϯςΟςΟ͸ҎԼͷଐੑΛ࣋ͭ ಺༰ ৼΔ෣͍ʢԋࢉʣ ঎඼*% ঎඼ͷࣝผࢠ
    ঎඼͝ͱʹҰҙ ͳ͠ ঎඼໊ ঎඼ͷ໊শ ͳ͠ ঎඼Ձ֨ ঎඼ͷՁ֨
    Ҏ্ͷ੔਺ ɾ঎඼ݸ਺ͱͷֻ͚ࢉ ࡏݿ ঎඼ͷࡏݿ਺
    Ҏ্ͷ੔਺ ɾࡏݿ͕ෆ଍͍ͯ͠Δ͔
25. &MPRVFOU 3FQPTJUPSZ class Item
 {
 /** @var int */
 private $id;
 
 /** @var string */
 private $name;
 
 /** @var int */
 private $price;
 
 /** @var int */
 private $stock;
 }
 int int int *UFNʢ঎඼ʣ
26. &MPRVFOU 3FQPTJUPSZ class Item
 {
 /** @var int */
 private $id;
 
 /** @var string */
 private $name;
 
 /** @var int */
 private $price;
 
 /** @var int */
 private $stock;
 }
 int int int *UFNʢ঎඼ʣ w
    υϝΠϯ͕൓ө͞Ε͍ͯͳ͍
    w
    UIJTTUPDL
    
    UIJTTUPDL

    
    
    
    ͋Γ͑ͳ͍ԋࢉ͕Ͱ͖Δ
    w
    UIJTQSJDF
    
    

    
    
    
    ૝ఆ֎ͷ࢖͍ํ͞ΕΔ
27. &MPRVFOU 3FQPTJUPSZ class Item
 {
 /** @var ItemId */
 private $id;
 
 /** @var string */
 private $name;
 
 /** @var ItemPrice */
 private $price;
 
 /** @var Stock */
 private $stock;
 }
 ItemId ItemPrice Stock ܕʢΫϥεʣͰදݱ
28. &MPRVFOU 3FQPTJUPSZ class ItemId
 {
 /** @var int */
 private $value;
 
 /**
 * @param int $value
 */
 public function __construct(int $value)
 {
 $this->value = $value;
 }
 
 public function value(): int
 {
 return $this->value;
 }
 } *UFN*E ৼΔ෣͍ʢԋࢉʣ͕ແ͍
29. &MPRVFOU 3FQPTJUPSZ class ItemPrice
 {
 /** @var int */
 private $value;
 
 
 public function __construct(int $value = 0)
 {
 if ($value < 0) {
 throw new PreconditionsException('value must be positive number:' . $value);
 }
 $this->value = $value;
 }
 //(snip)
 
 *UFN1SJDF ঎඼Ձ֨͸
    
    Ҏ্ͷ੔਺
30. &MPRVFOU 3FQPTJUPSZ 
 public function multi(ItemCount $count): ItemSubtotal
 {
 return new ItemSubtotal($this->value * $count->value());
 }
 *UFN1SJDF ঎඼Ձ֨
    
    ঎඼ݸ਺
    
    ঎඼খܭ
31. D
    
    .BTBTIJ
    4IJOCBSB
    !TIJOY 7BMVF0CKFDUͷϙΠϯτ w
    ϢϏΩλεݴޠΛίʔυͰදݱ

    
    
    
    ίʔυΛݟΕ͹࢓༷͕෼͔Δ
    w
    ϝιουͰఆٛͨ͠ԋࢉ͔͠Ͱ͖ͳ͍

    
    
    ؒҧ͍ΛݮΒͤΔ
    w
    ൚༻ܕͰ͸ͳ͘ಛԽܕͰ

    
    
    
    ʮ਺ࣈʯͰ͸ͳ͘ʮ঎඼Ձ֨ʯ
    w
    ڽू౓্͕͕Γɺѻ͍΍͍͢ɻςετͷ༰қ
32. &MPRVFOU 3FQPTJUPSZ class Cart
 {
 /** @var CartElement[]|Collection */
 private $elements;
 
 public function addItem(Item $item, ItemCount $count)
 {
 if ($item->stock()->isInsufficient($count)) {
 throw new PreconditionsException('stock is insufficient');
 }
 
 $this->elements->push(new CartElement($item, $count));
 }
 $BSU
    Χʔτʹ঎඼ΛೖΕΔ ࡏݿ͕ෆ଍͍ͯ͠Δ͔ʁ
33. &MPRVFOU 3FQPTJUPSZ class Cart
 {
 /** @var CartElement[]|Collection */
 private $elements;
 
 public function addItem(Item $item, ItemCount $count)
 {
 if ($item->stock()->isInsufficient($count)) {
 throw new PreconditionsException('stock is insufficient');
 }
 
 $this->elements->push(new CartElement($item, $count));
 }
 $BSU
    Χʔτʹ঎඼ΛೖΕΔ ΧʔτཁૉΛ௥Ճ
34. D
    
    .BTBTIJ
    4IJOCBSB
    !TIJOY υϝΠϯϨΠϠͷ࣮૷ w
    ϑϨʔϜϫʔΫ͔Βಠཱͯ͠
    1010
    Ͱ࣮૷
    w
    $PMMFDUJPO
    ͳͲυϝΠϯΛදݱ͢ΔൣғͳΒPL
    w
    7BMVF0CKFDU
    ͰυϝΠϯಛԽܕΛ࡞Γɺ

    
    
    ϢϏΩλεݴޠΛදݱ
    w
    υϝΠϯϨΠϠͰ͸
    70
    Λ࠷খཻ౓ʹ͢Δ

    
    
    
    70
    ಺Ҏ֎Ͱ͸εΧϥʔܕ͸࢖Θͳ͍ʢཧ૝ʣ
35. ΠϯϑϥετϥΫνϟϨΠϠ
36. D
    
    .BTBTIJ
    4IJOCBSB
    !TIJOY ΧʔτʹೖΕΔ"1* 
    1045ϦΫΤετ͔Β঎඼*%ͱ঎඼ݸ਺Λऔಘ
    
    σʔλϕʔε͔Β঎඼*%Ͱ঎඼Λऔಘ
    
    Χʔτʹ঎඼ΛೖΕΔ
    
    ΧʔτΛηογϣϯʹอଘ
    
    ϨεϙϯεΛฦ͢
37. D
    
    .BTBTIJ
    4IJOCBSB
    !TIJOY ΠϯϑϥετϥΫνϟϨΠϠ w
    σʔλετΞ΍ϝʔϧૹ৴ɺ֎෦
    "1*
    ࿈ܞͳͲ

    
    
    Ұൠతͳٕज़ػೳΛఏڙ͢ΔϨΠϠ
    w
    ϦϙδτϦɺΩϟογϡɺ"1*ΫϥΠΞϯτͳͲ
    w
    &MPRVFOU
    
    2VFSZ#VJMEFS
    
    $BDIF
38. D
    
    .BTBTIJ
    4IJOCBSB
    !TIJOY ϦϙδτϦ w
    ϞσϧͱσʔλετΞͷؒʹհࡏ͠ɺ෼཭
    w
    σʔλετΞ͔ΒͷϞσϧͷऔಘɺอଘૢ࡞Λ

    
    
    ΠϯλʔϑΣΠεͰఆٛ
    w
    σʔλετΞʹԠͯ͡ɺΠϯλʔϑΣΠεΛ࣮૷

    
    
    
    σʔλϕʔεɺ,74ɺϝϞϦͳͲ
39. D
    
    .BTBTIJ
    4IJOCBSB
    !TIJOY ঎඼৘ใͷऔಘ w
    υϝΠϯϞσϧ
    *UFN
    Ϋϥε
    w
    σʔλϕʔε
    JUFNT
    ςʔϒϧ
    w
    *UFN*E
    ΛҾ਺ʹऔΓɺ߹க͢Δ
    *UFN
    Λฦ͢
41. ΠϯϑϥετϥΫνϟ $POUSPMMFS %BUB
    5SBOTGFS
    0CKFDU 3FQPTJUPSZ
    *OUFSGBDF 'PSN
    3FRVFTU "QQMJDBUJPO
    4FSWJDF ϑΝΠϧߏ੒
    
    %PNBJOϨΠϠ ϦϙδτϦ
    ΠϯλʔϑΣΠε
42. &MPRVFOU 3FQPTJUPSZ interface ItemRepository
 {
 public function findById(ItemId $id): Item;
 } *UFN3FQPTJUPSZ
43. ΠϯϑϥετϥΫνϟ $POUSPMMFS %BUB
    5SBOTGFS
    0CKFDU 3FQPTJUPSZ
    *OUFSGBDF 'PSN
    3FRVFTU "QQMJDBUJPO
    4FSWJDF ϑΝΠϧߏ੒
    
    *OGSBTUSVDUVSF ϦϙδτϦ &MPRVFOU
44. &MPRVFOU 3FQPTJUPSZ class EloquentItemRepository implements ItemRepository
 {
 private $eloquent;
 
 public function __construct(EloquentItem $eloquent)
 {
 $this->eloquent = $eloquent;
 }
 
 public function findById(ItemId $id): Item
 {
 $item = $this->eloquent->find($id->value());
 if (empty($item)) {
 throw new NotFoundException('item not found');
 }
 
 return $item->toDomain();
 }
 } &MPRVFOU*UFN3FQPTJUPSZ
45. &MPRVFOU 3FQPTJUPSZ class EloquentItemRepository implements ItemRepository
 {
 private $eloquent;
 
 public function __construct(EloquentItem $eloquent)
 {
 $this->eloquent = $eloquent;
 }
 
 public function findById(ItemId $id): Item
 {
 $item = $this->eloquent->find($id->value());
 if (empty($item)) {
 throw new NotFoundException('item not found');
 }
 
 return $item->toDomain();
 }
 } &MPRVFOU*UFN3FQPTJUPSZ
46. &MPRVFOU 3FQPTJUPSZ class EloquentItem extends AppEloquent implements Domainable
 {
 protected $table = 'items';
 
 public function toDomain(): Item
 {
 return new Item(
 new ItemId($this->id),
 $this->name,
 new ItemPrice($this->price),
 new Stock($this->stock)
 );
 }
 } &MPRVFOU*UFN
47. &MPRVFOU 3FQPTJUPSZ class RepositoryServiceProvider extends ServiceProvider
 {
 public function register()
 {
 $this->app->bind(ItemRepository::class, EloquentItemRepository::class);
 }
 } ϦϙδτϦΛαʔϏείϯςφ΁όΠϯυ
48. &MPRVFOU 3FQPTJUPSZ class AddItemToCart
 {
 private $itemRepo;
 
 public function __construct(ItemRepository $itemRepo)
 {
 $this->itemRepo = $itemRepo;
 }
 
 public function add(int $itemId, int $count): Cart
 {
 $item = $this->itemRepo->findById(new ItemId($itemId));
 // (snip)
 }
 }
 ར༻ίʔυ
49. D
    
    .BTBTIJ
    4IJOCBSB
    !TIJOY ϦϙδτϦ
    
    &MPRVFOU w
    &MPRVFOU
    Λ
    1FSTJTUFODF
    .PEFM
    ʹ࢖͏
    w
    ΠϯϑϥετϥΫνϟϨΠϠͷ

    
    
    ϦϙδτϦ࣮૷ʹด͡ࠐΊΔ
    w
    ଞϨΠϠͰ
    &MPRVFOU
    ͸جຊ࢖Θͳ͍

    
    
    ʢϑϨʔϜϫʔΫར༻࣌͸আ͘ʣ
50. D
    
    .BTBTIJ
    4IJOCBSB
    !TIJOY ϦϙδτϦͷϝϦοτ w
    σʔλετΞ΍ΞΫηεखஈͷ੾ସ͕༰қ

    
    
    
    ຊ൪͸
    1PTUHSF42-
    
    ςετ͸
    ϝϞϦ
    w
    υϝΠϯϨΠϠ͔ΒσʔλετΞ΁ͷ࣮૷Λഉআ

    
    
    
    υϝΠϯϨΠϠ͸ΠϯλʔϑΣΠεͷϝιουΛݺͿ͚ͩ
    w
    ඞཁͳσʔλετΞ΁ͷૢ࡞Λ໌ࣔ

    
    
    
    7BMVF0CKFDU
    ͱಉ༷
51. ΞϓϦέʔγϣϯϨΠϠ
52. D
    
    .BTBTIJ
    4IJOCBSB
    !TIJOY ΧʔτʹೖΕΔ"1* 
    1045ϦΫΤετ͔Β঎඼*%ͱ঎඼ݸ਺Λऔಘ
    
    σʔλϕʔε͔Β঎඼*%Ͱ঎඼Λऔಘ
    
    Χʔτʹ঎඼ΛೖΕΔ
    
    ΧʔτΛηογϣϯʹอଘ
    
    ϨεϙϯεΛฦ͢
53. D
    
    .BTBTIJ
    4IJOCBSB
    !TIJOY ΞϓϦέʔγϣϯϨΠϠ w
    γεςϜͷίϯτϩʔϧΛ୲͏ϨΠϠ
    w
    ϢʔεέʔεͷྲྀΕΛ࡞Γɺ۩ମతͳॲཧ͸

    
    
    υϝΠϯ΍ΠϯϑϥετϥΫνϟʹҕৡ
    w
    3PVUF
    
    $POUSPMMFS
    
    "QQMJDBUJPO
    4FSWJDF
54. &MPRVFOU 3FQPTJUPSZ public function post(Request $request, AddItemToCart $service): JsonResponse
 {
 $this->validate($request, [
 'item_id' => 'required|integer',
 'count' => 'required|integer'
 ]);
 
 $cart = $service->add(
 $request->get('item_id'),
 $request->get('count')
 );
 
 return $this->ok(['cart' => $this->cartToArray($cart)]);
 } $POUSPMMFS ͬ͘͟ΓόϦσʔγϣϯ
 ʢυϝΠϯϧʔϧ͸υϝΠϯϨΠϠͰʣ
55. &MPRVFOU 3FQPTJUPSZ public function post(Request $request, AddItemToCart $service): JsonResponse
 {
 $this->validate($request, [
 'item_id' => 'required|integer',
 'count' => 'required|integer'
 ]);
 
 $cart = $service->add(
 $request->get('item_id'),
 $request->get('count')
 );
 
 return $this->ok(['cart' => $this->cartToArray($cart)]);
 } $POUSPMMFS ΞϓϦέʔγϣϯαʔϏε࣮ߦ
56. &MPRVFOU 3FQPTJUPSZ public function add(int $itemId, int $count): Cart
 {
 $item = $this->itemRepo->findById(new ItemId($itemId));
 
 try {
 $cart = $this->cartRepo->find();
 } catch (NotFoundException $e) {
 $cart = new Cart();
 }
 
 $cart->addItem($item, new ItemCount($count));
 $this->cartRepo->store($cart);
 
 return $cart;
 }
 "QQMJDBUJPO
    4FSWJDF
57. ·ͱΊ
58. D
    
    .BTBTIJ
    4IJOCBSB
    !TIJOY ·ͱΊ w
    υϝΠϯϨΠϠ͕ओɺͦΕҎ֎͸ै

    
    
    
    υϝΠϯϨΠϠͦ͜ΞϓϦέʔγϣϯ

    
    
    
    มԽͷૣ͍
    -BSBWFM
    ͔ͩΒͦ͜
    w
    υϝΠϯʹಛԽ࣮ͨ͠૷
    w
    -BSBWFM
    ͸ࣗ༝౓ͷߴ͍ϑϨʔϜϫʔΫ
    w
    ஌ݟΛͲΜͲΜڞ༗͠Α͏ʂ
59. D
    
    .BTBTIJ
    4IJOCBSB
    !TIJOY !TIJOY !TIJOY D
    
    .BTBTIJ
    4IJOCBSB
    !TIJOY
60. "QQFOEJY
61. D
    
    .BTBTIJ
    4IJOCBSB
    !TIJOY ͲΕ͔Β͸͡ΊΔʁ 7BMVF0CKFDU
62. D
    
    .BTBTIJ
    4IJOCBSB
    !TIJOY ୈҰาͱͯ͠ w
    ੍໿͕͋Δ΋ͷɺԋࢉΛߦ͏΋ͷΛ
    70
    Խ
    w
    Ձ֨ɺ೔෇ɺಛघͳ஋ʢ঎඼ίʔυͱ͔ʣ
    w
    JOU
    ʹͯ͠΋ɺ$BSCPO
    ʹͯ͠΋ૢ࡞͕๛෋

    
    
    
    υϝΠϯͰٻΊΒΕ͍ͯΔૢ࡞͕ݟ͑ͳ͍

    
    
    
    ஀ੜ೔ʹ࣌ؒ΍೔෇ͷ଍͠ࢉͱ͔͍Βͳ͍
    w
    υϝΠϯಛԽܕͱͯ͠ΫϥεԽ
63. &MPRVFOU 3FQPTJUPSZ class DateOfBirth
 {
 /** @var Carbon */
 private $date;
 
 public function __construct(Carbon $date)
 {
 $this->date = $date;
 }
 
 public function age(): int
 {
 return $this->date->age;
 }
 } ੜ೥݄೔Λ
    7BMVF0CKFDU
    Խ $BSCPOΛϥοϓ ඞཁͳૢ࡞ͷΈ࣮૷
64. D
    
    .BTBTIJ
    4IJOCBSB
    !TIJOY શ෦
    7BMVF0CKFDU
    ʹ͢Δʁ w
    ࣮ࡍɺखؒ͸͔͔Δ
    w
    JEʢJOUʣɺOBNFʢTUSJOHʣ͸
    70
    ʹͤͣ
    w
    70
    ʹ͢ΔͱɺϢϏΩλεݴޠΛਂ͘ߟ͑Δ

    
    
    
    ੍໿ɺඞཁͳૢ࡞
    w
    ڽू౓ͷߴ͍খ͞ͳΫϥεͷ࢖͍উखͷྑ͞

    
    
    
    ͜Εͦ͜ɺΦϒδΣΫτࢦ޲։ൃ