Laravel not reading array index in blade syntax

Question

I have an multidimensional array that I pass to a view in laravel. This array is used to output data to the view using blade syntax. But when I try to access a key in a @foreach loop I receive an error Invalid argument supplied for foreach() .
When I output the same array index within php tags the line before the @foreach () loop, there is no error. Can someone please give me a clue to why this would happen?

array var_dumped : $item['all']

@php
    echo var_dump($item['all']);
    die();
@endphp

array (size=1)
  0 => 
    array (size=22)
      'withdraw_prod' => int 0
      'class_id' => int 10
      'optional' => int 0
      'extra' => int 0
      'stage' => string 'NA' (length=2)
      'pest' => string 'NA' (length=2)
      'product' => string 'Monitering' (length=10)
      'description' => null
      'active' => null
      'class' => string 'Ander' (length=5)
      'rac_code' => null
      'htwoo' => string '0' (length=1)
      'prod_ha' => string '2.98' (length=4)
      'kgl_ha' => string '0.0000' (length=6)
      'hundred_met' => null
      'total' => string '0.0000' (length=6)
      'cost_kgl' => null
      'cost_total' => null
      'heading' => null
      'header' => int 0
      'hex' => null
      'is_na' => boolean true

Code next line that gives error:

@foreach ($item['all'] as $k => $spray)

Some LOG output:

<?php $__currentLoopData = $item['all']; $__env->addLoop($__currentLoopData); foreach($__currentLoopData as $k => $spray): $__env->incrementLoopIndices(); $loop = $__env->getLastLoop(); ?>

Laravel 5.6.39

Edit: I am trying to output data to a view that is generating a pdf from controller:

$pdf = PDF::loadView('direct.tory.here.is.pdf', compact('program', 'taboo', 'colour', 'footnotes'))->setPaper('a4', 'landscape');

The loops in the view is:

@foreach ($program as $key => $item)
    @if(!in_array($key, $taboo))
         @php
             $cnt = 0;
             $extra_row = 0;
             //echo var_dump($item['all']);
         @endphp
         @foreach ($item['all'] as $k => $spray)
              @php
                  // for in case array dimensions differ
                  $sprays = (array_key_exists(0, $spray)) ? $spray[0] : $spray;
                      if(!empty($sprays['description'])) {
                         $extra_row++;
                       }
                @endphp
          @endforeach
    @endif
    @php
         $col++;
    @endphp
@endforeach

Solved it This is a bit embarrassing, but I had created an array with taboo keys that filtered out non array values from my main array $program. For testing two months ago an extra dummy key => value that contained an integer was added for testing, but was never added to the taboo list. This dummy integer value was slipping through causing the @foreach loop not being able to iterate over the $item['all'] which did not exist for that array index. Thank you for your input all who commented.

Answer 1

I had created an array with taboo keys that filtered out non array values from my main array $program. For testing two months ago an extra dummy key => value that contained an integer was added for testing, but was never added to the taboo list. This dummy integer value was slipping through causing the @foreach loop not being able to iterate over the $item['all'] which did not exist for that array index.

So solution is oversight and not type checking before using a value.