PHP - Selecting Highest Version Number

|  id          | int(4)       | NO   | PRI | NULL    | auto_increment |
| user_id     | int(4)       | NO   |     | NULL    |                |
| recipient   | varchar(30)  | NO   |     | NULL    |                |
| subject     | varchar(25)  | YES  |     | NULL    |                |
| cc_email    | varchar(30)  | YES  |     | NULL    |                |
| reply       | varchar(20)  | YES  |     | NULL    |                |
| location    | varchar(50)  | YES  |     | NULL    |                |
| stationery  | varchar(40)  | YES  |     | NULL    |                |
| ink_color   | varchar(12)  | YES  |     | NULL    |                |
| fontchosen  | varchar(30)  | YES  |     | NULL    |                |
| message     | varchar(500) | NO   |     | NULL    |                |
| attachment  | varchar(40)  | YES  |     | NULL    |                |
| messageDate | datetime     | YES  |     | NULL    |        

            $params = array(                 
               ':user_id' => $userid,                 
               ':recipient' => $this->message_vars['recipient'],                 
               ':subject' => $this->message_vars['subject'],                 
               ':cc_email' => $this->message_vars['cc_email'],                 
               ':reply' => $this->message_vars['reply'],                 
               ':location' => $this->message_vars['location'],                 
               ':stationery' => $this->message_vars['stationery'],                 
               ':ink_color' => $this->message_vars['ink_color'],                 
               ':fontchosen' => $this->message_vars['fontchosen'],                 
               ':message' => $messageInput,                 
               ':attachment' => $this->message_vars['attachment'],                 
               ':messageDate' => $date             );

$sql = "INSERT INTO messages (user_id,recipient, subject, cc_email, reply, location,stationery, ink_color, fontchosen, message,attachment) VALUES( $userid, :recipient, :subject, :cc_email, :reply, :location, :stationery, :ink_color, :fontchosen, $messageInput, :attachment, $date);";

And lastly, here is how I am calling it:
            $dbh = parent::$dbh;             
           $dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_WARNING);              
           if (empty($dbh))    return false;             
                  $stmt = $dbh->prepare($sql);             
                 $stmt->execute($params) or die(print_r($stmt->errorInfo(), true));              
           if (!$stmt) {    print_r($dbh->errorInfo());              }

//set default postage value outside loop

 $postagerate = 15.00;

I currently have an array that I've built that dumps like this:

0 => array:11 [▼
      "category_code" => "123"
      "category_name" => "Testing"
      "category_description" => "This is a test category"
      19738 => array:5 [▼
        "identifier" => "720368842943"
        "description" => Test Description One
        "count" => 4
        "details" => array:2 [▼
          0 => array:3 [▼
            "detail_code" => "2751"
            "detail_code2" => "43"
            "detail_specifier" => "Detail One"
          ]
          1 => array:3 [▼
            "detail_code" => "2681"
            "detail_code2" => "9"
            "detail_specifier" => "Detail Two"
          ]
        ]
        "prices" => array:1 [▼
          "01" => "1129.00"
        ]
      ]
      19739 => array:5 [▼
        "identifier" => "720368844121"
        "description" => "Test Description Two"
        "count" => 4
        "details" => array:2 [▼
          0 => array:3 [▼
            "detail_code" => "2751"
            "detail_code2" => "43"
            "detail_specifier" => "Detail One"
          ]
          1 => array:3 [▼
            "detail_code" => "2681"
            "detail_code2" => "9"
            "detail_specifier" => "Detail Two"
          ]
        ]
        "prices" => array:1 [▼
          "01" => "1490.00"
        ]
      ]

I'm using laravel excel in order to export that as an excel file, but it's not quite working the way I intend

When it exports to excel I only get the top level info:

    123  |  Testing  |  This is a test category

But I want to get that info as a header and then each subsequent product for that category as a row, so with the example above it would look like:

    123  |  Testing  |  This is a test category
    ====================================================================================================================
    19738  |  720368842943  |  Test Description One  |  4  |  2751  |  43  |  Detail One  |  2681  |  9  |  Detail Two  |  1129.00
    19739  |  720368844121  |  Test Description Two  |  4  |  2751  |  43  |  Detail One  |  2681  |  9  |  Detail Two  |  1490.00

Here's the excel code with the array I'm using, which is dumped above: 

  $allCategoryResult= array();

    foreach($prices->categories as $category){ 
        $categoryItem = array(); 
        $categoryItem["category_code"] = $category->category_code;
        $categoryItem["category_name"] = $category->category_name; 
        $categoryItem["category_desc"] = $category->category_desc;

        foreach($category->skus as $sku){
            $skuItem = array(); 

            $skuItem["identifier"] = $sku->sku_info->identifier;
            $skuItem["description"] = $sku->sku_info->item->description;
            $skuItem["count"] = $sku->sku_info->item->item_type->count;
            
            $skuItem["details"] = array(); 
            foreach ($sku->sku_info->details as $details) {
                $detailsItem = array(); 
                $detailsItem["detail_code"] = $details->detail_code;
                $detailsItem["detail_code2"] = $details->detail_code2;
                $detailsItem["detail_specifier"] = $details->detail_specifier;
                $skuItem["details"][] = $detailsItem; 
            }

            $skuItem["prices"] = get_object_vars($sku->prices);


            $itemCode = $sku->sku_info->item->item_code;
            $categoryItem[$itemCode] = $skuItem; 
        }
        $allCategoryResult[] = $categoryItem; 
    }


    $name = 'Test Export';

        $build = Excel::create($name, function ($excel) use ($allCategoryResult) {

            $excel->setTitle('Test Export');

            $excel->sheet('Test Export', function ($sheet) use ($allCategoryResult) {

                $sheet->fromArray($allCategoryResult);

public function Update(Entry $e)
    {
        try
        {
            $query = "update entry set string = $e->string,delimiter=$e->delimiter where entryid= $e->id";
            $stmt = $this->db->mysqli->prepare($query);
            $stmt->bind_param('ssi',$e->string,$e->delimiter,$e->id);

            $stmt->close();
           

        }
        catch(Exception $ex)
        {
            print 'Error: ' .$ex->getMessage();
        }
    }

$sql = "
SELECT 
	student, sum( test_score ) as score
FROM 
	test
INNER JOIN 
	level 
ON 
	test.level_id = level.level_id
GROUP BY 
	student"
$result = $mysqli->query($sql, MYSQLI_STORE_RESULT);
if($result)
{
      while ($row = $result->fetch_array(MYSQLI_ASSOC))
       {
	    var_dump($row);
       }
}

array (size=2)
  'John' => string 'English' (length=2)
  'Score' => string '20' (length=3)

array (size=2)
  'Mary' => string 'Math' (length=3)
  'Score' => string '35' (length=3)

array (size=2)
  'Samuel' => string 'Physics' (length=3)
  'Score' => string '5' (length=3)