Online PHP editor | output for n6fuv

<?php function calc(float $number, float $result, string $operation) { echo "$result $operation $number = "; if ($operation == "+") { $result += $number; } elseif ($operation == "-") { $result -= $number; } elseif ($operation == "*") { $result *= $number; } elseif ($operation == "/") { $result /= $number; } echo "$result\n"; return $result; } $input = "144/2*5-14.4="; $numbers = preg_split('/[+]|[-]|[=]|[*]|\\//u', $input); $operations = preg_split('/[0-9]+[.]*[0-9]*/', $input); foreach ($numbers as &$number) { $number = floatval($number); } $result = $numbers[0]; for ($i = 1; $i < count($numbers) - 1; $i++) { $result = calc($numbers[$i], $result, $operations[$i]); } echo $input.$result;