php if _SERVER REQUEST_METHOD POST leftOperand _POST leftOperand right

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  • 14 Dec 2014 
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<?php

    if ($_SERVER['REQUEST_METHOD'] == 'POST') {

        $leftOperand = $_POST['leftOperand'];

        $rightOperand = $_POST['rightOperand'];

        $result = " ";

        if (isset($leftOperand) && isset($rightOperand)) {

            if (isset($_POST['plus'])) {

                $result = $leftOperand + $rightOperand;

            } elseif(isset($_POST['minus'])) {

                $result = $leftOperand - $rightOperand;

            } elseif (isset($_POST['multiply'])){

                $result = $leftOperand * $rightOperand;

            } elseif (isset($_POST['division'])){

                if ($rightOperand != '0') {

                    $result = $leftOperand / $rightOperand;

                } else $result = "На ноль делить нельзя!";

            }

        }

    }

?>

<html>

    <head>

        <title>Homework 4</title>

    </head>



    <body>

        <form method="post">

            <input type="text" name="leftOperand" value="<? echo $leftOperand ?>">

            <input type="text" name="rightOperand" value="<? echo $rightOperand ?>">

            <?php

            echo ' = ';

            echo $result;

            ?><br>

            <input type="submit" name="plus" value="+">

            <input type="submit" name="minus" value="-">

            <input type="submit" name="multiply" value="*">

            <input type="submit" name="division" value="/">





        </form>

    </body>



</html>
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