$ key => $ categoryTournamentのforeach（$ list = $ categoryTournament）$ key unorderered

私はLaravelを使用していますが、これはPHPにとっては一般的だと思います。

私はこのコード

@foreach($categoryTournaments as $key => $categoryTournament) 
    {{ $key }} // Means echo 
@endforeach

出力とでループにコレクションを試してみてください。私は、ランダムに代わり、私が期待するべきであるとして0 1 2 3 4を持つのunordererキーを取得1 0 2 4 3

。すべてのアイデアは、なぜそれが起こっている

Collection {#522 ▼ 
    #items: array:5 [▼ 
    0 => CategoryTournament {#523 ▼ 
     #dates: array:3 [▶] 
     #table: "category_tournament" 
     +timestamps: true 
     #fillable: array:2 [▶] 
     #connection: null 
     #primaryKey: "id" 
     #perPage: 15 
     +incrementing: true 
     #attributes: array:6 [▼ 
     "id" => 164 
     "tournament_id" => 71 
     "category_id" => 5 
     "created_at" => "2016-03-23 00:04:47" 
     "updated_at" => "2016-03-23 00:04:47" 
     "deleted_at" => null 
     ] 
     #original: array:6 [▶] 
     #relations: [] 
     #hidden: [] 
     #visible: [] 
     #appends: [] 
     #guarded: array:1 [▶] 
     #dateFormat: null 
     #casts: [] 
     #touches: [] 
     #observables: [] 
     #with: [] 
     #morphClass: null 
     +exists: true 
     +wasRecentlyCreated: false 
     #forceDeleting: false 
    } 
    1 => CategoryTournament {#524 ▼ 
     #dates: array:3 [▶] 
     #table: "category_tournament" 
     +timestamps: true 
     #fillable: array:2 [▶] 
     #connection: null 
     #primaryKey: "id" 
     #perPage: 15 
     +incrementing: true 
     #attributes: array:6 [▶] 
     #original: array:6 [▶] 
     #relations: [] 
     #hidden: [] 
     #visible: [] 
     #appends: [] 
     #guarded: array:1 [▶] 
     #dateFormat: null 
     #casts: [] 
     #touches: [] 
     #observables: [] 
     #with: [] 
     #morphClass: null 
     +exists: true 
     +wasRecentlyCreated: false 
     #forceDeleting: false 
    } 
    2 => CategoryTournament {#525 ▼ 
     #dates: array:3 [▶] 
     #table: "category_tournament" 
     +timestamps: true 
     #fillable: array:2 [▶] 
     #connection: null 
     #primaryKey: "id" 
     #perPage: 15 
     +incrementing: true 
     #attributes: array:6 [▶] 
     #original: array:6 [▶] 
     #relations: [] 
     #hidden: [] 
     #visible: [] 
     #appends: [] 
     #guarded: array:1 [▶] 
     #dateFormat: null 
     #casts: [] 
     #touches: [] 
     #observables: [] 
     #with: [] 
     #morphClass: null 
     +exists: true 
     +wasRecentlyCreated: false 
     #forceDeleting: false 
    } 
    3 => CategoryTournament {#526 ▼ 
     #dates: array:3 [▶] 
     #table: "category_tournament" 
     +timestamps: true 
     #fillable: array:2 [▶] 
     #connection: null 
     #primaryKey: "id" 
     #perPage: 15 
     +incrementing: true 
     #attributes: array:6 [▶] 
     #original: array:6 [▶] 
     #relations: [] 
     #hidden: [] 
     #visible: [] 
     #appends: [] 
     #guarded: array:1 [▶] 
     #dateFormat: null 
     #casts: [] 
     #touches: [] 
     #observables: [] 
     #with: [] 
     #morphClass: null 
     +exists: true 
     +wasRecentlyCreated: false 
     #forceDeleting: false 
    } 
    4 => CategoryTournament {#527 ▼ 
     #dates: array:3 [▶] 
     #table: "category_tournament" 
     +timestamps: true 
     #fillable: array:2 [▶] 
     #connection: null 
     #primaryKey: "id" 
     #perPage: 15 
     +incrementing: true 
     #attributes: array:6 [▶] 
     #original: array:6 [▶] 
     #relations: [] 
     #hidden: [] 
     #visible: [] 
     #appends: [] 
     #guarded: array:1 [▶] 
     #dateFormat: null 
     #casts: [] 
     #touches: [] 
     #observables: [] 
     #with: [] 
     #morphClass: null 
     +exists: true 
     +wasRecentlyCreated: false 
     #forceDeleting: false 
    } 
    ] 
}

：

CategoryTournamentは、私は5オブジェクトに参加し、オブジェクトのですか？

出典

2016-03-23 Juliatzin del Toro

コレクションクラスが正確に何か言うことができますか？おそらく、反復子インターフェイスの実装にはカスタムロジックが含まれているかもしれません。 – kozlice

https://laravel.com/docs/master/collections –