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Wiernusz

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Posts posted by Wiernusz

    Help with this simple Calculator

    in PHP Coding Help

    Posted

    Still giving those errors. Thanks alot for the help, anyways.

     

     

    I'm just going to find another place to start learning.

     

    Well that may be, but I think you are saving the wrong file. The code I posted should not produce any notice errors.  My 2cents, you are saving the wrong file.

     

    Here is the code I tested on my server, with no notice errors etc.

     

    <?php
error_reporting(E_ALL);
ini_set("display_errors", 1);
if (!isset($_POST['submit']) || ($_POST['val1'] == "") || ($_POST['val2'] == "") || ($_POST['calc'] == "")) {
    header("Location: calculate_form.php");
    exit;
}

if ($_POST['calc'] == "add") {
    $result = $_POST['val1'] + $_POST['val2'];
$what = " plus ";
} else if ($_POST['calc'] == "subtract") {
    $result = $_POST['val1'] - $_POST['val2'];
$what = " minus ";
} else if ($_POST['calc'] == "multiply") {
    $result = $_POST['val1'] * $_POST['val2'];
$what = " times ";
} else if ($_POST['calc'] == "divide") {
    $result = $_POST['val1'] / $_POST['val2'];
$what = " divided by ";
}

echo 'My calculations returned: ' . $_POST['val1'] . $what . $_POST['val2'] . " = " . $result;
?>

     

    Which returned:

    My calculations returned: 2 plus 3 = 5

     

     

     

    It seems as you were typing this, I edited my previous post... I did end up getting it working with your previous post.  Thanks alot! It did work :)

     

    For the most part, I see what was wrong, and it's weird the publisher hadn't mentioned it. But to say the least - the book has been the best one yet (no throwing in stuff and not telling me about it!). Considering how much I've learned here compared to a whole bunch of other places, I decided I will finish this book.

     

     

    Helping me fix that code taught me a few things, and props to you for taking time to help me out here. You rock!

    Help with this simple Calculator

    in PHP Coding Help

    Posted

    Considering I am a PHP beginner, and this book is telling me to do things the wrong way (from the looks of it)... I am just going to scratch this whole thing, because I am just plain lost.

     

    One thing I would really like to know though, is the completed code for this to actually work so I can review it, and not have these past few hours of learning be a waste.

     

     

    If anyone is willing to show me the working script with no Notices/errors, I would be a happy person (for now!) :)

     

    Again, thanks for the help everybody.

    Help with this simple Calculator

    in PHP Coding Help

    Posted

    Hello. I am currently following a tutorial on building a simple calculator.

     

    Here is my calculation code:

     

     

    <?PHP
if (($_POST[val1] == "") || ($_POST[val2] == "") || ($_POST[calc] == "")) {
    header("Location: calculate_form.php");
    exit;
}
if ($_POST[calc] == "add") {
    $result = $_POST[val1] + $_POST[val2];
} else if ($_POST[calc] == "subtract") {
    $result = $_POST[val1] - $_POST[val2];
} else if ($_POST[calc] == "multiply") {
    $result = $_POST[val1] * $_POST[val2];
} else if ($_POST[calc] == "divide") {
    $result = $_POST[val1] / $_POST[val2];
}
?>

     

     

    And here is my form code:

    <html>

<head>

<title>Calculation Form</title>
</head>

<body>
<font size="3" face="verdana">

<FORM METHOD="post" ACTION="calc.php">
<P>Value 1: <INPUT TYPE="text" NAME="val1" SIZE=10></P>
<P>Value 2: <INPUT TYPE="text" NAME="val2" SIZE=10></P>
<P>Calculation:<br>
[<INPUT TYPE="radio" NAME="calc" VALUE="add"> <b>+</b> ]
[<INPUT TYPE="radio" NAME="calc" VALUE="subtract"> - ]
[<INPUT TYPE="radio" NAME="calc" VALUE="multiply"> <b>*</b> ]
[<INPUT TYPE="radio" NAME="calc" VALUE="divide">  <b>/</b> ]</P>

<P><INPUT TYPE="submit" NAME="submit" VALUE="Calculate"></P>
</FORM>





</body>
</html>

     

     

    It apparently works, but it also gives me these warnings, along with the correct math answer;

     

     

    Notice: Use of undefined constant val1 - assumed 'val1' in E:\wamp\www\Learning\Calculator\calc.php on line 2

    Notice: Use of undefined constant val2 - assumed 'val2' in E:\wamp\www\Learning\Calculator\calc.php on line 2

    Notice: Use of undefined constant calc - assumed 'calc' in E:\wamp\www\Learning\Calculator\calc.php on line 2

    Notice: Use of undefined constant calc - assumed 'calc' in E:\wamp\www\Learning\Calculator\calc.php on line 6

    Notice: Use of undefined constant calc - assumed 'calc' in E:\wamp\www\Learning\Calculator\calc.php on line 8

    Notice: Use of undefined constant val1 - assumed 'val1' in E:\wamp\www\Learning\Calculator\calc.php on line 9

    Notice: Use of undefined constant val2 - assumed 'val2' in E:\wamp\www\Learning\Calculator\calc.php on line 9

     

     

     

    I've put this together using a PHP 5 tutorial from a book, and have gone over it 4 times to make sure I havn't missed anything. Any help/tips would be greatly appreciated.

     

    Thanks in advance!

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