calculator


Posted on 16th Feb 2014 07:03 pm by admin

I can't figure out why this code doesn't work. No error messages. Page loads.

Code: <?php # Script 3.9 - calculator.php
$page_title = 'Widget Cost Calculator';
include ('./header.html');



function calculate_total ($tax= 5) {
global $total;
$taxrate = $tax / 100;
$total = ($_POST['quantity'] * $_POST['price']) * ($taxrate + 1);
$total = number_format ($total, 2);
}


if (isset($_POST['submitted'])) {

if (is_numeric($_POST['quantity']) && is_numeric($_POST['price'])) {


echo '<h1 id="mainhead">Total Cost</h1>';

$total = NULL;

if (is_numeric($_POST['tax'])) {
calculate_total ($_POST['tax']);
} else {
calculate_total ();
}

echo '<p>The total cost of purchasing '. $_POST['quantity'] .' widget(s) at $'.
number_format ($_POST['price'], 2). ' each is $'. $total .'.</p>';

echo '<p><br/></p>';

} else {

echo '<h1 id="mainhead">Error!</h1>
<p class="error">Please enter a valid quantity and price.</p><p><br/></p>';
}

}

?>
<h2>Widget Cost Calculator</h2>
<form action="calculator.php" method="post">
<p>Quantity: <input type="text" name="quantity" size="5" maxlength="10" value="<?php if (isset($_POST['quantity'])) echo $_POST['quantity'];?>"/></p>
<p>Price: <input type="text" name="price" size="5" maxlength="10" value="<?php if (isset($_POST['price'])) echo $_POST['price'];?>"/></p>
<p>Tax (%): <input type="text" name="tax" size="5" maxlength="10" value="<?php if (isset($_POST['tax'])) echo $_POST['tax'];?>"/>(optional)</p>
<p><input type="submit" name"submit" value="Calculate!"/></p>
<input type="hidden" name"submitted" value="TRUE"/>
</form>


<?php
include ('./footer.html');
?>The calculator does not work and won't display anything. I've checked the code three times in the text book and I believe their is no typo's. What am I doing wrong?

No comments posted yet

Your Answer:

Login to answer
68 Like 24 Dislike
Previous forums Next forums
Other forums

Embedding flash object in Else statement
This is my first major project in PHP and I'm having some trouble embedding a flash object in an Els

problems with contact forms that are only protected against SQL injections
What could be a potential problem with contact forms that are only protected against SQL injections

Escape Latin Characters
I need to escape latin characters in an xml doc. Example: "é" is escaped to "é". I thoug

Trigger tag in aspx is not coming
hi all ,iam new to ajax, iam using file upload inside the update pannel but right now i want to use

php mysql query from input textbox
Hi,

I have a text box, in that i have given the mysql query. I can able to get the query in v

checkbox update
I am having a brain fart right now and i cant remember how to do this. if anyone could help that wou

How to kill asynchronous postback / current postback?
Hi,here is my problem:I have a web site with many pages of which some may take time to process resul

ereg_replace in Wordpress
Heya - so I'm working on this site: http://world-of-smiles.theportlandco.com/new-patients

The

Create comparison matrix?
I want to create a comparison script for forum software and was wondering is there any tutorial or b

ALV List Display to point to another report on Double Click
Hi,

I want my ALV List Display to point to another report on Double Click on its line ite

Sign up to write
Sign up now if you have flare of writing..
Login   |   Register
Follow Us
Indyaspeak @ Facebook Indyaspeak @ Twitter Indyaspeak @ Pinterest RSS



Play Free Quiz and Win Cash