Online PHP editor | refs for 3O7ng

<?php error_reporting(-1); mb_internal_encoding('utf-8'); $input = '78.95+874.1*3/11.3-88='; $inputLength = mb_strlen($input); $result = 0; //результат предыдущего действия $numbersAndOperations = array(); $numbersAndOperations = preg_split('/(?=[-+*=\\/])|(?<=[-+*=\\/])/', $input); $result = $numbersAndOperations[0]; for ($i = 1; $i < count($numbersAndOperations); $i+=2) { if ($numbersAndOperations[$i] == '+'){ $result += intval($numbersAndOperations[$i+1]); }elseif($numbersAndOperations[$i] == '-'){ $result -= intval($numbersAndOperations[$i+1]); }elseif($numbersAndOperations[$i] == '*'){ $result *= intval($numbersAndOperations[$i+1]); }elseif($numbersAndOperations[$i] == '/') { $result /= intval($numbersAndOperations[$i+1]); }else { echo "Ответ: $input$result"; } }