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';
Did you know?Explore Trending and Topic pages for more stories like this.
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

Code clarification
Hi

In the following code what could be the "search_print()" and where it could be

JQuery, Masterpage, and Control issue
Hey everyone, I am using JQuery in several sites so I thought it would be best to place the library

frame help
on the bottom frame is menu.html

Code: <body><form action='link.php' met

Exporting new records
Trying to figure out the best way to set this up.

People register my site.

Their prof

Allegro crashes when running load_bitmap. Why?
I can not get Allegro to load any BMP images. Here is a section of test code. The picture is in the

xml
<?php

echo "<h1>XML Articles</h1>";

$home

images aren't rendering
I'm trying to call a JPG file from within PHP (in an effort to hide the actual JPG folder). The imag

insert/update functions for mysql, what do you think?
I am working on two really simple functions that automatically generate (and execute) insert and upd

redirect standard error and assert (how to?)
How do you redirect standard error and assert?

---

(Why? I am creating an web app and

Help With Showing Users On the Index Page
Ive got this code which works just how i want it to.

Code: <?
$timenow=time();

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