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Easy to learn: [Calculator] |
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| Submitted on: 9/27/2002 7:33:37 PM
By: PWFilms
Level: Beginner
User Rating: Unrated
Compatibility:PHP 3.0, PHP 4.0
Users have accessed this code 350 times.
| (About the author) |
| | | This code is a very easy way to teach you post variables and simple php. It uses math equasions, and its just overall a simple little calculator. You can check it out in action at <a href="http://www.paddedwallsfilms.com/php/project1-acipriano.php">this</a> location. Have fun.
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By using this code, you agree to the following terms...
1) You may use
this code in your own programs (and may compile it into a program and distribute it in compiled format for languages that allow it) freely and with no charge.
2) You MAY NOT redistribute this code (for example to a web site) without written permission from the original author. Failure to do so is a violation of copyright laws.
3) You may link to this code from another website, but ONLY if it is not wrapped in a frame.
4) You will abide by any additional copyright restrictions which the author may have placed in the code or code's description. |
//**************************************
//
// Name: Easy to learn: [Calculator]
// Description:This code is a very easy
// way to teach you post variables and simp
// le php. It uses math equasions, and its
// just overall a simple little calculator.
// You can check it out in action at <a
// href="http://www.paddedwallsfilms.com/ph
// p/project1-acipriano.php">this</a&
// gt; location. Have fun.
// By: PWFilms
//
//This code is copyrighted and has // limited warranties.Please see http://
// www.Planet-Source-Code.com/xq/ASP/txtCod
// eId.754/lngWId.8/qx/vb/scripts/ShowCode.
// htm //for details. //**************************************
//
<?php #start the php coding
# check and see if our variables have been defined
$n1 = $HTTP_POST_VARS['n1']; # this calls the variables
$n2 = $HTTP_POST_VARS['n2']; # from when you define them
$do = $HTTP_POST_VARS['do']; # in the text boxes
# check the value of the variable called "do" and calculate the variable based on what "do" says to do
if($do == 'sum of') # this is what the do variable is
{
$answer = $n1 + $n2; # this adds the variables
$text = "The ".$do." ".$n1." and ".$n2." is <b>".$answer."</b>."; # this writes down the answer
}
if($do == 'difference between') # add a comment here
{
$answer = $n1 - $n2; #add a comment here
$text = "The ".$do." ".$n1." and ".$n2." is
<b>".$answer."</b>."; #add a comment here
}
if($do == 'product of') # add a comment here
{
$answer = $n1 * $n2; #add a comment here
$text = "The ".$do." ".$n1." and ".$n2." is
<b>".$answer."</b>."; #add a comment here
}
if($do == 'quotient of') # add a comment here
{
$answer2 = $n1 / $n2; #add a comment here
$answer = round($answer2, 1);
$text = "The ".$do." ".$n1." and ".$n2." is
<b>".$answer."</b>."; #add a comment here
}
if($do == 'exponent of') # add a comment here
{
$answer = bcpow($n1,$n2);
$text = "The ".$do." ".$n1." and ".$n2." is
<b>".$answer."</b>."; #add a comment here
}
?>
<html>
<head>
<title>Assignment 1: Reading the get vars and doing some calculations</title>
</head>
<body bgcolor=#787F87 text=black>
<font face="Trebuchet MS" size="-1" color="black">
<br><br><br><br><center><table cellpadding='0' cellspacing='0' width='50%' height='30%' border=1 bordercolor=black>
<tr valign='center'>
<td align='center' bgcolor=#787F87 text=black border=1 bordercolor=black>
<!-- this page returns to itself via the POST method -->
<!-- We use POST instead of get because with get, you can read the variables in the url -->
<form action='<?= $PHP_SELF; ?>' method='post'>
Find the
<!-- Here we define the do so the php knows how to handle the inputed numbers -->
<select name='do'>
<option value='<?= $do; ?>'><?= $do; ?>
<option value='sum of'> sum of
<option value='difference between'> difference between
<option value='product of'> product of
<option value='quotient of'> quotient of
<option value='exponent of'> exponent of
</select>
<!-- this is the text field which defines the number n1 -->
<input type=text size='2' max='4' name='n1' value='<?= $n1; ?>'> and
<!-- this is the text field which defines the number n2 -->
<input type=text size='2' max='4' name='n2' value='<?= $n2; ?>'>.
<p>
<!-- this submits the information using the post tag above so we can compute the answer -->
<input type=submit name='submit' value='Do it!'>
<p>
<font face="Trebuchet MS" size="-1" color="blue"><b>
<!-- this is the answer -->
<?= $text; ?></b></font>
</form>
</td>
</tr>
</table></center>
</body>
</html>
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