Online PHP editor | refs for J8Of7

<?php /**** PlaceHolder to emulate file ****/ $input = <<<EOL RFHSEP34 | 20 RETBBHUJ | 10 TYRHBNNM | 5 EOL; $lookup = []; $handle = tmpfile(); fwrite($handle, $input); rewind($handle); while ($matches = fscanf($handle, "%[^ |] |%d", $discount, $amount)) { if ($matches === 2) { $lookup[$discount] = $amount; } } fclose($handle); //var_export($lookup); $_POST['disCode'] = 'RETBBHUJ'; $total = 500; $total -= $lookup[$_POST['disCode'] ?? ''] ?? 0; var_export($total);