如何从循环中获取值到刀片 - laravel
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【中文标题】如何从循环中获取值到刀片 - laravel【英文标题】：How to get the values from the loop to the blade - laravel 【发布时间】：2019-09-11 07:00:07 【问题描述】：我使用 for 循环来获取查询并能够存储在数组中。 eg: 的数组看起来像 i: 时的样子
dd($s);
array:2 [▼
"Block A" => array:49 [▶]
"Block K" => array:149 [▶]
]
现在有了这些每个数组，我有更多数据，我想在刀片的选择框中显示它。
array:2 [▼
"Block A" => array:49 [▼
0 => array:1 [▼
"Block A0" => "1"
]
我只想显示 1 在 Block A0 => 1
homeController.php
foreach ($v as $f )
$m[$i] = [
$l.$i => $f->rNum,
];
$s[$l] = $m;
$i++;
$s = (array_filter($s));
return view('home')->with($s);
// I have also tried with
//return view('home')->with('res',$s);
Home.blade.php
@foreach ($res as $s)
<option value="> _____?____" </option>
//I only want to display 1 to 49 here
@endforeach
记住有 2 个数组，Block A 和 Block K
所以选择框应该在第二个选择框中包含块 A 的所有值（即：1 到 49 ）和块 K 的所有值（即：1 到 149 ）。
我不太清楚如何在这里获取值，但至少我能够在控制器中获取值
**
完整的控制器代码
public function viewHall($id)
$path = request()->path();
$substring = substr($path, 0,10);
$title;
$viewApp;
$viewroom = "";
$s[] = array();
$i = 1;
if ($substring == "view/hall/")
$viewApp = DB::select('Select * from applications where hall = "'.$id .'" AND status = "pending"');
foreach ($viewApp as $k)
$a[] = $k->flat;
$countA = (count($a));
foreach ($a as $l)
$viewroom = DB::select('Select applications.* , residences.* , rooms.* from applications
LEFT Join residences on applications.resi = residences.resiName
LEFT JOIN rooms on rooms.resiID = residences.id
where hall = "'.$id .'" AND status = "pending" AND rooms.available = 0
AND rooms.flatName ="'.$l.'" group by rooms.flatName, rooms.roomNum');
foreach ($viewroom as $f )
$s[$l][$i] = [
$l => $f->roomNum,
];
$i++;
$s = (array_filter($s));
$title = "Hall (" . $id .")";
return view('admin.viewapp')->with('applications', $viewApp)->with('title',$title)->with('rid',$id)->with('rooms',$viewroom)
->with('roomNs', $s)->with('flat',$a)->with('flatc', $m);
elseif ($substring == "view/resi/")
$viewApp = DB::select('Select * from applications where resi = "'.$id .'" AND status = "pending"');
$viewroom = DB::select('Select applications.* , residences.* , rooms.* from applications
LEFT Join residences on applications.resi = residences.resiName
LEFT JOIN rooms on rooms.resiID = residences.id
where resi = "'.$id .'" AND status = "pending" AND rooms.available = 0');
$title = "Residence (" . $id .")";
elseif ($substring == "view/year/")
$viewApp = DB::select('Select * from applications where year = "'.$id .'" AND status = "pending"');
$viewroom = DB::select('Select applications.* , residences.* , rooms.* from applications
LEFT Join residences on applications.resi = residences.resiName
LEFT JOIN rooms on rooms.resiID = residences.id
where applications.year = "'.$id .'" AND status = "pending" AND rooms.available = 0');
$title = "Year (" . $id .")";
else
$viewApp = DB::select('Select * from applications where status = "pending"');
$viewroom = DB::select('Select applications.* , residences.* , rooms.* from applications
LEFT Join residences on applications.resi = residences.resiName
LEFT JOIN rooms on rooms.resiID = residences.id
where status = "pending" AND rooms.available = 0');
$title = "View All";
return view('admin.viewapp')->with('applications', $viewApp)->with('title',$title)->with('rid',$id)->with('rooms',$viewroom)
-with('roomNs', $roomN);
**
**
查看.blade.php
<form class="" action="URL('process/')" method="post">
csrf_field()
<table class="table">
<thead>
<tr>
<th scope="col">#</th>
<th scope="col">Hall</th>
<th scope="col">Residence</th>
<th scope="col">Year</th>
<th scope="col">Flat</th>
<th scope="col">Room</th>
<th scope="col">Status</th>
<th scope="col">Submitted on</th>
<th scope="col">Approve</th>
<th scope="col">Reject</th>
</tr>
</thead>
<tbody>
<tr>
@foreach ($applications as $show)
<input type="hidden" name="id" value="$show->id">
<input type="hidden" name="hall" value="$show->hall">
<input type="hidden" name="resID" value="$show->resID">
<input type="hidden" name="year" value="$show->year">
<input type="hidden" name="flat" value="$show->flat">
<th scope="row">$i</th>
<td>$show->hall</td>
<td>$show->resi</td>
<td>$show->year</td>
<td>$show->flat</td>
<td>
<div class="form-group">
<select class="form-control" id="roomNo" name="roomNo" required autofocus>
<option value="" selected>Select Room Number</option>
<?php $i=0; ?>
@foreach ($roomNs as $key1 => $value1)
@foreach ($value1 as $key2 => $value2)
@foreach ($value2 as $key3 => $value3)
<option value=" $value3 "> $value3 </option>
@endforeach
@endforeach
@endforeach
</select>
</div>
</td>
<td>$show->status</td>
<td>$show->created_at</td>
<td><input type="submit" class="btn btn-primary"name="approve" value="Approve"></td>
<td><input type="submit" class="btn btn-danger"name="reject" value="Reject"></td>
</tr>
@endforeach
</tbody>
</table>
</form>
**
【问题讨论】：
【参考方案1】：所以既然这是你的数组结构，你想做的就是为此使用 3 个 foreach 循环。
假设在你的控制器中返回这个：
return view('home')->with('res', $s);
这是您想要在视图中执行的操作：
@foreach ($res as $key1 => $value1)
@foreach ($value1 as $key2 => $value2)
@foreach ($value2 as $key3 => $value3)
<option value=" $value3 "> $key3 " </option>
@endforeach
@endforeach
@endforeach
PS
请正确命名您的变量。不要像$s 或$res 那样命名，如果您适当地命名变量，它将在您的项目增长时对您有很大帮助。
跟进回答：
在您的控制器中。我不确定$v 变量的值是什么，以及您在 foreach 循环中要做什么。我认为要解决您为“Block K”获取 100 个数据而不是 149 个数据的问题，您必须这样做：
foreach ($v as $f )
$s[$l][$i] = [
$l.$i => $f->rNum,
];
$i++;
答案 #2：
这是我在您看来的建议：
<form class="" action="URL('process/')" method="post">
csrf_field()
<table class="table">
<thead>
<tr>
<th scope="col">#</th>
<th scope="col">Hall</th>
<th scope="col">Residence</th>
<th scope="col">Year</th>
<th scope="col">Flat</th>
<th scope="col">Room</th>
<th scope="col">Status</th>
<th scope="col">Submitted on</th>
<th scope="col">Approve</th>
<th scope="col">Reject</th>
</tr>
</thead>
<tbody>
@foreach ($applications as $show)
<tr>
<input type="hidden" name="id" value="$show->id">
<input type="hidden" name="hall" value="$show->hall">
<input type="hidden" name="resID" value="$show->resID">
<input type="hidden" name="year" value="$show->year">
<input type="hidden" name="flat" value="$show->flat">
<th scope="row">$i</th>
<td>$show->hall</td>
<td>$show->resi</td>
<td>$show->year</td>
<td>$show->flat</td>
<td>
<div class="form-group">
<select class="form-control" id="roomNo" name="roomNo" required autofocus>
<option value="" selected>Select Room Number</option>
<?php $i=0; ?>
@foreach ($roomNs[$show->flat] as $key1 => $value1)
@foreach ($value1 as $key2 => $value2)
<option value=" $value2 "> $value2 </option>
@endforeach
@endforeach
</select>
</div>
</td>
<td>$show->status</td>
<td>$show->created_at</td>
<td><input type="submit" class="btn btn-primary"name="approve" value="Approve"></td>
<td><input type="submit" class="btn btn-danger"name="reject" value="Reject"></td>
</tr>
@endforeach
</tbody>
</table>
</form>
块引用
【讨论】：
谢谢@aceraven，我试过了，它工作正常。但是，我刚刚意识到一个问题。显示块 A 有 49 个，块 K 有 149 个数组的数组是错误的。这些来自循环中的数据库。并且有两组数组。块 A 和块 K。在块 A 中，我有 49 个，这是正确的，在块 K 中，我有 100 个。所以在视图中，我在第一个选择框中得到 49，但在第二个选择框中我得到哪个是块 K，我得到 149。我怎样才能在这个选项中只得到 100 个数组？块 K 从循环中的第 50 个数组开始。你能帮忙吗？谢谢。 我附上了输出的截图。 谢谢，我会试试的。 $v 是我正在获取的 sql 查询。我正在尝试在每个 Blocks 中编号。 rNum 是数字。 好吧，我使用 dd($s) 从控制器获得了所需的值；但是，视图中的循环仍未在两个选择框中显示正确的值（如屏幕截图所示）。 – Sarah Malik 10 分钟前 @SarahMalik，你能分享控制器中的整个代码吗？以便我可以进一步帮助您。以上是关于如何从循环中获取值到刀片 - laravel的主要内容，如果未能解决你的问题，请参考以下文章
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