Undefined array key 1

SYSTEMPATH/View/Cell.php at line 167

PHP Code:

160             }
161 
162             $params = explode($separator, $params);
163             unset($separator);
164 
165             foreach ($params as $p) {
166                 if (! empty($p)) {
167                     [$key, $val] = explode('=', $p); // ERROR LINE - Undefined array key 1 
168 
169                     $newParams[trim($key)] = trim($val, ', ');
170                 }
171             }
172 
173             $params = $newParams;
174             unset($newParams); 


my code is:

PHP Code:

view_cell('\App\Libraries\get::getHtml', 'id='.$News['category']) 


$News['category'] is "42,57658,154,236"(this not work) or $News['category'] is "42" only(this work)

code in Libraries\get.php

PHP Code:

namespace App\Libraries;



class get
{

    public function getHtml($id)
    { 
   
        $return = explode(',', $id);

        foreach ($return as $row) {

           $html[] = '<span class="badge rounded-pill bg-success">'.$row.'</div>';

        }

        return $html;
    }
}