Get dynamic values ​of dynamic arrays in a mode - php

Question

I want to obtain the data of an Audit model, that within its columns old_values ​​and new_values ​​are stored arrays, but dynamic. When I do the foreach in the view it gives me the following error when wanting to show these columns:
ErrorException (E_ERROR) htmlspecialchars() expects parameter 1 to be string, array given (View: H:\DAF\resources\views\audit\index.blade.php)
I've already searched several blogs and they say how to do something similar but with static arrays, not with dynamic ones.
The Audit model is Laravel's vendor to audit called OwenIt\Auditing.
class Audit extends Model implements \OwenIt\Auditing\Contracts\Audit
{
use \OwenIt\Auditing\Audit;
/**
* {#inheritdoc}
*/
protected $guarded = [];
/**
* {#inheritdoc}
*/
protected $casts = [
'old_values' => 'json',
'new_values' => 'json',
'auditable_id' => 'integer',
];
}
Controller
<?php
namespace App\Http\Controllers;
use OwenIt\Auditing\Models\Audit;
class EstaticasController extends Controller {
public function audit() {
$audit = Audit::orderBy( 'id', 'DESC' )->get();
return view( 'audit.index', compact( 'audit' ) );
}
}
Vista
<table class="table table-bordered table-hover table-stripped">
<thead>
<tr>
<th>No</th>
<th>Operación</th>
<th>Tupla</th>
<th>Tabla</th>
<th>Valores antiguos</th>
<th>Valores Actuales</th>
<th>URL</th>
<th>IP</th>
<th>Creado</th>
<th>Actualizado</th>
</tr>
</thead>
<tbody>
<?php $no = 1 ?>
#foreach($audit as $item)
<tr>
<td>{{ $no++ }}</td>
<td>{{ $item->event }}</td>
<td>{{ $item->auditable_id }}</td>
<td>{{ $item->auditable_type }}</td>
<td>{{ $item->old_values }}</td>
<td>{{ $item->new_values }}</td>
<td>{{ $item->url }}</td>
<td>{{ $item->ip_address }}</td>
<td>{{ $item->created_at }}</td>
<td>{{ $item->updated_at }}</td>
</tr>
#endforeach
</tbody>
</table>
Image of Table
Image of DB with data

Answer 1

I think here is the issue:
// ...
// <td>{{ $item->auditable_type }}</td>
<td>{{ $item->old_values }}</td>
<td>{{ $item->new_values }}</td>
// <td>{{ $item->url }}</td>
// ...
The problem here is that, in order to print them in screen, the front-end is expecting the value to be string, but you are giving it an array. That's why the error is throw:
ErrorException (E_ERROR) htmlspecialchars() expects parameter 1 to be string, array given (View: H:\DAF\resources\views\audit\index.blade.php)
To solve it, you just have to iterate over the array to print every element of it:
#foreach ($item->old_values as $value)
<p>{{ $value }}</p>
#endforeach