在循环中将索引附加到变量名

Question

我在视图中使用 Laravel 和 Blade 模板。我正在写出一些数据，因为我的列具有相同的名称，最后有一个数字，我想我可以遍历它们而不是全部写出来。

这是我目前拥有的：

我正在传递一个名为 $scores 的对象/数组：

<span>{{ $scores->hole1 }}</span>
<span>{{ $scores->hole2 }}</span>
<span>{{ $scores->hole3 }}</span>
<span>{{ $scores->hole4 }}</span>
<span>{{ $scores->hole5 }}</span>

.. 等等

我想做的是这样的：

@for ($i = 1; $i < 19; $i++)
    <span>{{ $scores->hole . ${i} }}</span>
@endfor

但我似乎无法正确地在变量名末尾附加索引值的语法。这是可能的吗，还是我以错误的方式处理这个问题？

$scores 是我在控制器中构建并传递给刀片模板的对象。 $scores 中的数据如下所示：

object(stdClass)[212]
  public 'id' => int 3
  public 'course_name' => string 'Golf Club A' (length=15)
  public 'played_date' => string '2014-02-05' (length=10)
  public 's_hole1' => int 5
  public 's_hole2' => int 6
  public 's_hole3' => int 4
  public 's_hole4' => int 5
  public 's_hole5' => int 6
  public 's_hole6' => int 4
  public 's_hole7' => int 4
  public 's_hole8' => int 5
  public 's_hole9' => int 4
  public 's_hole10' => int 3
  public 's_hole11' => int 5
  public 's_hole12' => int 4
  public 's_hole13' => int 5
  public 's_hole14' => int 4
  public 's_hole15' => int 3
  public 's_hole16' => int 4
  public 's_hole17' => int 3
  public 's_hole18' => int 4
  public 't_hole1' => int 4
  public 't_hole2' => int 3
  public 't_hole3' => int 5
  public 't_hole4' => int 4
  public 't_hole5' => int 4
  public 't_hole6' => int 4
  public 't_hole7' => int 4
  public 't_hole8' => int 5
  public 't_hole9' => int 4
  public 't_hole10' => int 3
  public 't_hole11' => int 5
  public 't_hole12' => int 4
  public 't_hole13' => int 5
  public 't_hole14' => int 4
  public 't_hole15' => int 3
  public 't_hole16' => int 4
  public 't_hole17' => int 3
  public 't_hole18' => int 4

Answer 1

试试

<?php $scoresArray = (array) $scores; ?>

@for ($i = 1; $i < 19; $i++)
<span>{{ $scoresArray["hole$i"] }}</span>
@endfor

顺便说一句，您的方法似乎是错误的。尝试使用一个数组来存储孔和一个@foreach 来循环。对于未来的变化，这样的事情会更加灵活

// Create object
$scores = (object) array(
    'id' => 3,
    'course_name' => 'Golf Club A',
    'played_date' => '2014-02-05',
    's_holes' => array(5, 6, 4, 5, 6, 4, 4, 5, 4, 3, 5, 4, 5, 4, 3, 4, 3, 4),
    't_holes' => array(4, 3, 5, 4, 4, 4, 4, 5, 4, 3, 5, 4, 5, 4, 3, 4, 3, 4)
);

// In your view
@foreach ($scores->s_holes as $hole => $value)
<span>Hole {{$hole}}: {{$value}}</span>
@endforeach