Laravel Foreach 来自数组
Laravel Foreach From Array
这是我对象的print_r；
Array
(
[country] => Illuminate\Database\Eloquent\Collection Object
(
[items:protected] => Array
(
[0] => App\Models\Location Object
(
[connection:protected] =>
[table:protected] =>
[primaryKey:protected] => id
[perPage:protected] => 15
[incrementing] => 1
[timestamps] => 1
[attributes:protected] => Array
(
[country] => Scotland
)
[original:protected] => Array
(
[country] => Scotland
)
[relations:protected] => Array
(
)
[hidden:protected] => Array
(
)
[visible:protected] => Array
(
)
[appends:protected] => Array
(
)
[fillable:protected] => Array
(
)
[guarded:protected] => Array
(
[0] => *
)
[dates:protected] => Array
(
)
[casts:protected] => Array
(
)
[touches:protected] => Array
(
)
[observables:protected] => Array
(
)
[with:protected] => Array
(
)
[morphClass:protected] =>
[exists] => 1
)
[1] => App\Models\Location Object
(
[connection:protected] =>
[table:protected] =>
[primaryKey:protected] => id
[perPage:protected] => 15
[incrementing] => 1
[timestamps] => 1
[attributes:protected] => Array
(
[country] => England
)
[original:protected] => Array
(
[country] => England
)
[relations:protected] => Array
(
)
[hidden:protected] => Array
(
)
[visible:protected] => Array
(
)
[appends:protected] => Array
(
)
[fillable:protected] => Array
(
)
[guarded:protected] => Array
(
[0] => *
)
[dates:protected] => Array
(
)
[casts:protected] => Array
(
)
[touches:protected] => Array
(
)
[observables:protected] => Array
(
)
[with:protected] => Array
(
)
[morphClass:protected] =>
[exists] => 1
)
[2] => App\Models\Location Object
(
[connection:protected] =>
[table:protected] =>
[primaryKey:protected] => id
[perPage:protected] => 15
[incrementing] => 1
[timestamps] => 1
[attributes:protected] => Array
(
[country] => Wales
)
[original:protected] => Array
(
[country] => Wales
)
[relations:protected] => Array
(
)
[hidden:protected] => Array
(
)
[visible:protected] => Array
(
)
[appends:protected] => Array
(
)
[fillable:protected] => Array
(
)
[guarded:protected] => Array
(
[0] => *
)
[dates:protected] => Array
(
)
[casts:protected] => Array
(
)
[touches:protected] => Array
(
)
[observables:protected] => Array
(
)
[with:protected] => Array
(
)
[morphClass:protected] =>
[exists] => 1
)
[3] => App\Models\Location Object
(
[connection:protected] =>
[table:protected] =>
[primaryKey:protected] => id
[perPage:protected] => 15
[incrementing] => 1
[timestamps] => 1
[attributes:protected] => Array
(
[country] =>
)
[original:protected] => Array
(
[country] =>
)
[relations:protected] => Array
(
)
[hidden:protected] => Array
(
)
[visible:protected] => Array
(
)
[appends:protected] => Array
(
)
[fillable:protected] => Array
(
)
[guarded:protected] => Array
(
[0] => *
)
[dates:protected] => Array
(
)
[casts:protected] => Array
(
)
[touches:protected] => Array
(
)
[observables:protected] => Array
(
)
[with:protected] => Array
(
)
[morphClass:protected] =>
[exists] => 1
)
)
)
)
我想要一个 foreach 循环来打印出 country 数组中的三个国家 -（英格兰、威尔士、苏格兰）。
我试过循环，例如；
@foreach ($locations['country'] as $country)
{{ $country }}
@endforeach
我已经尝试过此的其他变体，但无济于事。正确的语法是什么？另外，有人可以解释我如何解释这个，以便我以后可以更好地理解数组的 foreach 吗？我通常只是猜测，直到我得到正确的结果 - 但对于一个改变，我想真正知道如何将它们组合在一起，如果这有意义的话..
如果有帮助，我正在使用 Laravel...
您要循环的不是数组。这是一个 Laravel 合集。但是它的行为就像一个数组，所以它并不重要。循环本身实际上看起来是正确的。但是，您不仅要输出 $country，还必须实际访问 $country 上名为 country:
的属性
@foreach($locations['country'] as $location)
{{ $location->country }}
@endforeach
通常，foreach 循环遍历数组或集合中的每个项目，并将该项目放入您在 as 之后定义的变量中。也许 this explanation 也有帮助。
作为额外的一点：Laravel 有一个很好的 lists() 函数，它根据集合中每个模型的属性构建一个数组。
$countries = $locations['country']->lists('country');
会导致类似的结果：
['England', 'Wales', 'Scotland']
然后您可以使用 implode() 之类的函数生成逗号分隔列表：
implode(', ', $countries); // returns 'England, Wales, Scotland'
这是我对象的print_r；
Array
(
[country] => Illuminate\Database\Eloquent\Collection Object
(
[items:protected] => Array
(
[0] => App\Models\Location Object
(
[connection:protected] =>
[table:protected] =>
[primaryKey:protected] => id
[perPage:protected] => 15
[incrementing] => 1
[timestamps] => 1
[attributes:protected] => Array
(
[country] => Scotland
)
[original:protected] => Array
(
[country] => Scotland
)
[relations:protected] => Array
(
)
[hidden:protected] => Array
(
)
[visible:protected] => Array
(
)
[appends:protected] => Array
(
)
[fillable:protected] => Array
(
)
[guarded:protected] => Array
(
[0] => *
)
[dates:protected] => Array
(
)
[casts:protected] => Array
(
)
[touches:protected] => Array
(
)
[observables:protected] => Array
(
)
[with:protected] => Array
(
)
[morphClass:protected] =>
[exists] => 1
)
[1] => App\Models\Location Object
(
[connection:protected] =>
[table:protected] =>
[primaryKey:protected] => id
[perPage:protected] => 15
[incrementing] => 1
[timestamps] => 1
[attributes:protected] => Array
(
[country] => England
)
[original:protected] => Array
(
[country] => England
)
[relations:protected] => Array
(
)
[hidden:protected] => Array
(
)
[visible:protected] => Array
(
)
[appends:protected] => Array
(
)
[fillable:protected] => Array
(
)
[guarded:protected] => Array
(
[0] => *
)
[dates:protected] => Array
(
)
[casts:protected] => Array
(
)
[touches:protected] => Array
(
)
[observables:protected] => Array
(
)
[with:protected] => Array
(
)
[morphClass:protected] =>
[exists] => 1
)
[2] => App\Models\Location Object
(
[connection:protected] =>
[table:protected] =>
[primaryKey:protected] => id
[perPage:protected] => 15
[incrementing] => 1
[timestamps] => 1
[attributes:protected] => Array
(
[country] => Wales
)
[original:protected] => Array
(
[country] => Wales
)
[relations:protected] => Array
(
)
[hidden:protected] => Array
(
)
[visible:protected] => Array
(
)
[appends:protected] => Array
(
)
[fillable:protected] => Array
(
)
[guarded:protected] => Array
(
[0] => *
)
[dates:protected] => Array
(
)
[casts:protected] => Array
(
)
[touches:protected] => Array
(
)
[observables:protected] => Array
(
)
[with:protected] => Array
(
)
[morphClass:protected] =>
[exists] => 1
)
[3] => App\Models\Location Object
(
[connection:protected] =>
[table:protected] =>
[primaryKey:protected] => id
[perPage:protected] => 15
[incrementing] => 1
[timestamps] => 1
[attributes:protected] => Array
(
[country] =>
)
[original:protected] => Array
(
[country] =>
)
[relations:protected] => Array
(
)
[hidden:protected] => Array
(
)
[visible:protected] => Array
(
)
[appends:protected] => Array
(
)
[fillable:protected] => Array
(
)
[guarded:protected] => Array
(
[0] => *
)
[dates:protected] => Array
(
)
[casts:protected] => Array
(
)
[touches:protected] => Array
(
)
[observables:protected] => Array
(
)
[with:protected] => Array
(
)
[morphClass:protected] =>
[exists] => 1
)
)
)
)
我想要一个 foreach 循环来打印出 country 数组中的三个国家 -（英格兰、威尔士、苏格兰）。
我试过循环，例如；
@foreach ($locations['country'] as $country)
{{ $country }}
@endforeach
我已经尝试过此的其他变体，但无济于事。正确的语法是什么？另外，有人可以解释我如何解释这个，以便我以后可以更好地理解数组的 foreach 吗？我通常只是猜测，直到我得到正确的结果 - 但对于一个改变，我想真正知道如何将它们组合在一起，如果这有意义的话..
如果有帮助，我正在使用 Laravel...
您要循环的不是数组。这是一个 Laravel 合集。但是它的行为就像一个数组，所以它并不重要。循环本身实际上看起来是正确的。但是，您不仅要输出 $country，还必须实际访问 $country 上名为 country:
@foreach($locations['country'] as $location)
{{ $location->country }}
@endforeach
通常，foreach 循环遍历数组或集合中的每个项目，并将该项目放入您在 as 之后定义的变量中。也许 this explanation 也有帮助。
作为额外的一点：Laravel 有一个很好的 lists() 函数，它根据集合中每个模型的属性构建一个数组。
$countries = $locations['country']->lists('country');
会导致类似的结果：
['England', 'Wales', 'Scotland']
然后您可以使用 implode() 之类的函数生成逗号分隔列表：
implode(', ', $countries); // returns 'England, Wales, Scotland'