Online PHP editor | refs for 78S4p

<?php $value = 81; $edge_cases = ['C','A']; $category = ''; if($value > 40 && $value <= 50){ $category = 'BC'; }else if($value > 50 && $value <= 70){ $category = 'B'; }else if($value > 70 && $value <= 80){ $category = 'AB'; }else{ $quotient = intval($value / 80); $index = abs(intval($quotient / (($quotient - 1) | 1))); $category = $edge_cases[$index]; } echo $category;