Simple PHP Calculator

[RageD]

Here is a simple PHP Calculator. I created it originally for an example on using classes but you can use it anyway you wish

<?php
// Calculator Script v1
// Copyright (C) 2007 RageD

// Define to make this all one document
$page = $_GET['page'];

// Defining the "calc" class
class calc {
     var $number1;
     var $number2;

          function add($number1,$number2)
          {
                   $result =$number1 + $number2;
                    echo("The sum of $number1 and $number2 is $result<br><br>");
                    echo("$number1 + $number2 = $result");
                    exit;
           }

          function subtract($number1,$number2)
          {
                   $result =$number1 - $number2;
                    echo("The difference of $number1 and $number2 is $result<br><br>");
                    echo("$number1 &#045 $number2 = $result");
                    exit;
           }

          function divide($number1,$number2)
          {
                   $result =$number1 / $number2;
                    echo("$number1 divided by $number2 is $result<br><br>");
                    echo("$number1 ÷ $number2 = $result");
                    exit;
           }

          function multiply($number1,$number2)
          {
                   $result =$number1 * $number2;
                    echo("The product of $number1 and $number2 is $result<br><br>");
                    echo("$number1 x $number2 = $result");
                    exit;
           }
}
$calc = new calc();
?>
<TITLE>PHP Calculator v1</TITLE>
<form name="calc" action="?page=calc" method="POST">
Number 1: <input type=text name=value1><br>
Number 2: <input type=text name=value2><br>
Operation: <input type=radio name=oper value="add">Addition <input type=radio name=oper value="subtract">Subtraction <input type=radio name=oper value="divide">Division <input type=radio name=oper value="multiply">Multiplication</input><br>
<input type=submit value="Calculate">
</form>
<?php
if($page == "calc"){
$number1 = $_POST['value1'];
$number2 = $_POST['value2'];
$oper = $_POST['oper'];
     if(!$number1){
          echo("You must enter number 1!");
          exit;
     }
     if(!$number2){
          echo("You must enter number 2!");
          exit;
     }
     if(!$oper){
          echo("You must select an operation to do with the numbers!");
          exit;
     }
     if(!eregi("[0-9]", $number1)){
          echo("Number 1 MUST be numbers!");
          exit;
     }
     if(!eregi("[0-9]", $number2)){
          echo("Number 2 MUST be numbers!");
          exit;
     }
     if($oper == "add"){
          $calc->add($number1,$number2);
     }
     if($oper == "subtract"){
          $calc->subtract($number1,$number2);
     }
     if($oper == "divide"){
          $calc->divide($number1,$number2);
     }
     if($oper == "multiply"){
          $calc->multiply($number1,$number2);
     }
}
?>

Enjoy!

-RageD

 

[iNod]

Nice calculator.. You could add a few functions too it.. Such as round, sqrt, etc.

- Steve

 

[RageD]

If you would like me to I could do that. Like I said it was an example script to explain classes but I could expand

-RageD