PHP to Laravel loop conversion - php

Question

I am trying to convert this PHP code:
<?php
foreach ($arr as $v) {
echo '<tr><td>' . $v['bookTitle'] . '</td><td>';
$ar = array();
foreach ($v['authors'] as $key => $value) {
**$ar[] = '' . $value . '';**
}
echo implode(' , ', $ar) . '</td></tr>';
}
?>
into Laravel code, but have problems
#foreach ($arr as $v)
<tr><td> {{ $v['bookTitle'] }}</td><td>
<?php $ar = array(); ?>
#foreach ($v['authors'] as $key => $value)
***$ar[] = . $value . ;*** //{{ Html::link("all?authorID= $key", "$value")}}
#endforeach
{{implode(' , ', $ar)}}</td></tr>
#endforeach
Can someone please help me with this?
#foreach ($arr as $v)
<tr><td> {{ $v['bookTitle'] }}</td><td>
#php $ar = array(); #endphp
#foreach ($v['authors'] as $key => $value)
#php $ar[]; #endphp = {{ Html::link("all?authorID= $key", "$value")}}
#endforeach
{{implode(' , ', $ar)}}</td></tr>
#endforeach
FatalErrorException
Cannot use [] for reading

Answer 1

Your mistake is at this line. The $val is not exist as your are make each object in loop to $value variable
$ar[] = . $val . ;
Secondly, the blade syntax is like below. Refer to Docs for detail usage.
#foreach ($v['authors'] as $key => $value)
<td>{{ $value }}</td>
#endforeach
Note: Please keep the long code in controller instead of routes/web.php

Answer 2

As you're using Larvel 5.4.x, you can simply do the following and not have to re-write it using blade:
#php
foreach ($arr as $v) {
echo '<tr><td>' . $v['bookTitle'] . '</td><td>';
$ar = array();
foreach ($v['authors'] as $key => $value) {
$ar[] = '' . $value . '';
}
echo implode(' , ', $ar) . '</td></tr>';
}
#endphp
Albeit it's not the best solution, but, until you can move this logic into the controller and not have it within the view, it might be a good interim solution.
If you open up the following link for Control Structures within the Laravel documentation: https://laravel.com/docs/5.4/blade#control-structures and scroll down to the heading named "PHP" it should give you everything you need.