mik*_*yuk 1 php arrays foreach laravel eloquent
这是print_r我的目标;
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循环打印country阵列中的三个国家- (英格兰,威尔士,苏格兰).
我试过循环,如;
@foreach ($locations['country'] as $country)
{{ $country }}
@endforeach
我尝试了其他的变化但无济于事.什么是正确的语法？此外,有人可以解释我如何解释这一点,以便将来更好地了解foreach与数组？我通常只是猜测,直到我得到正确的结果 - 但是如果有意义的话,我想知道如何将一个放在一起.
如果有帮助,我正在使用Laravel ...
你循环的不是数组.这是一个Laravel系列.但它的行为就像一个数组,所以它并不重要.循环本身实际上看起来正确.但是,不仅仅是输出,$country您必须实际访问被$country调用的属性country:
@foreach($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,并将该项目放入您定义的变量之后as.也许这个解释也有帮助.
稍微多一点:Laravel有一个很好的lists()功能,可以从集合中的每个模型的属性构建一个数组.
$countries = $locations['country']->lists('country');
会导致类似于:
['England', 'Wales', 'Scotland']
然后你可以使用像implode()生成逗号分隔列表的函数:
implode(', ', $countries); // returns 'England, Wales, Scotland'