Question

我在Laravel（5.1）视图中有以下代码。 PHP 块中的代码决定了我应该将哪个类应用于下面的第一个 td 元素。

@foreach($datesUnavailable as $dateUnavailable)
    <?php
        $unavailableDate = strtotime($dateUnavailable->unavailable_on);
        $creationDate = strtotime($dateUnavailable->created_at);
        $newformat = date('D, M d, Y',$unavailableDate);

        $createdBefore = ($unavailableDate - $creationDate)/86400;

        if($createdBefore >= 5) {
            $class = "alert alert-success";                                           
        } else if ($createdBefore < 5 && $createdBefore >= 3) {
            $class = "alert alert-warning"; 
        } else {
            $class = "alert alert-danger";
        }
    ?>
    <tr>
        <td class={{ $class }}>{{ $newformat }}</td>
        <td>{{ $dateUnavailable->unavailability_type }}</td>
        <td>
            {!! Form::open([
                'method' => 'DELETE',
                'route' => ['delete-unavailability', $alias, $dateUnavailable->uc_key],
                'onsubmit' => 'return submitResult();'
            ]) !!}
                {!! Form::submit('Delete', ['class' => 'btn btn-danger btn-xs']) !!}
            {!! Form::close() !!}
        </td>
    </tr>
@endforeach

但是，当页面呈现时，td元素上的类显示为

<td class="alert" alert-success="">Wed, Feb 28, 2018</td>

也就是说，我想让它显示class =＆＃34; alert alert-success＆＃34; （基于逻辑）但它显示这个奇怪的字符串。如果我执行var_dump（$ class），我会看到$ class变量的值为＆＃34; alert alert-success＆＃34;。

知道为什么会这样吗？

Answer 1

这应该适合你：

<td class="{{ $class }}">

Answer 2

添加缺少的"标记。

@foreach($datesUnavailable as $dateUnavailable)
    <?php
        $unavailableDate = strtotime($dateUnavailable->unavailable_on);
        $creationDate = strtotime($dateUnavailable->created_at);
        $newformat = date('D, M d, Y',$unavailableDate);

        $createdBefore = ($unavailableDate - $creationDate)/86400;

        if($createdBefore >= 5) {
            $class = "alert alert-success";                                           
        } else if ($createdBefore < 5 && $createdBefore >= 3) {
            $class = "alert alert-warning"; 
        } else {
            $class = "alert alert-danger";
        }
    ?>
    <tr>
        <td class="{{ $class }}">{{ $newformat }}</td> <!-- Changed this line -->
        <td>{{ $dateUnavailable->unavailability_type }}</td>
        <td>
            {!! Form::open([
                'method' => 'DELETE',
                'route' => ['delete-unavailability', $alias, $dateUnavailable->uc_key],
                'onsubmit' => 'return submitResult();'
            ]) !!}
                {!! Form::submit('Delete', ['class' => 'btn btn-danger btn-xs']) !!}
            {!! Form::close() !!}
        </td>
    </tr>
@endforeach

Laravel 5.1 Blade（或只是普通回声）错误地显示类

2 个答案: