Transforming an array to CssClasses

 1use Illuminate\Support\Arr;
 2 
 3$array = ['p-4', 'font-bold' => $isActive, 'bg-red' => $hasError];
 4 
 5$isActive = false;
 6$hasError = true;
 7 
 8$classes = Arr::toCssClasses($array);
 9 
10/*
11 * 'p-4 bg-red'
12 */

Tip given by @dietsedev