Calculator script.

[Dentafrice]

Switches ftw (I just read that Caleb suggested using them, I find them much easier to use for a script like this).

I think they are a better alternative when parsing types, EX in this script would be the method that you are using to perform the calculation.

Or verifying that an option in a submission form is actually an option provided, and not someone submitting something that is either malicious, or just not acceptable.

[Protege]

Could of at least put the buttons on the page and made it abit interesting, but celebs right with the switch & case method, its how I'd do it and many others.

[Jackboy]

I think you should make it into an actual calculator shape wud be a good idea

[Excellent]

Just echo what they put in.. say the fields were call blah 1 and blah 2.

elseif($submit){
$sum=$blah+$blah1;
echo "$blah+$blah1=$sum"; 

[Dentafrice]

Even easier:

<?php
$number1 = $_POST["number1"];
$number2 = $_POST["number2"];
$type = $_POST["type"];

switch( $type )
{
    case "+": $calculation = $number1 + $number2; break;
    case "-": $calculation = $number1 - $number2; break;
    case "/": $calculation = $number1 / $number2; break;
    case "*": $calculation = $number1 * $number2; break;
    default: "You ain't doin math boy.";
}

echo $number1 . " " . $type . " " . $number2 . " = " . $calculation;
?>

[Independent]

Even easier:

<?php
$number1 = $_POST["number1"];
$number2 = $_POST["number2"];
$type = $_POST["type"];

switch( $type )
{
    case "+": $calculation = $number1 + $number2; break;
    case "-": $calculation = $number1 - $number2; break;
    case "/": $calculation = $number1 / $number2; break;
    case "*": $calculation = $number1 * $number2; break;
    default: "You ain't doin math boy.";
}

echo $number1 . " " . $type . " " . $number2 . " = " . $calculation;
?>

Haha, love it.