Back
Nataliia's BMI Calculator

CODE FOLLOWS

<?php



include('includes/header.php');



error_reporting(E_ALL);    // show all errors



echo('<h1>Nataliia\'s BMI Calculator</h1>');



$step = isset($_POST['step']) ? $_POST['step'] : 0;

$weight = isset($_POST['weight']) ? $_POST['weight'] : '';

$height = isset($_POST['height']) ? $_POST['height'] : '';



$step = htmlentities($step);

$weight = htmlentities($weight);

$height = htmlentities($height);



if ($step == 0)   // first time in form

{

    ?>



    <form action="bmi.php" method="POST">

        <label for="weight">Weight (lbs)</label>

        <input type="text" size="10" id="weight" name="weight" value="">

        <br><br>



        <label for="height">Height (ft)</label>

        <input type="text" size="10" id="height" name="height" value="">

        <br><br>



        <input type="hidden" name="step" value="1">

        <input type="submit" name="submit" value="Submit">

    </form>



    <?php

}

else

{

    echo('<p>The following is what the form gathered</p>');

    echo('<pre>');

    print_r($_POST);

    echo('</pre>');



    // convert height in feet to inches

    $heightInches = $height * 12;



    // BMI formula for lbs/inches: (weight / (height^2)) * 703

    $bmi = ($weight / ($heightInches * $heightInches)) * 703;



    echo("<h3>Your BMI = $bmi</h3>");



    ?>



    <form action="bmi.php" method="POST">

        <input type="hidden" name="step" value="0">

        <input type="submit" name="submit" value="Try Again">

    </form>



    <?php

}



include('includes/footer.php');

?>
Back