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

How can I get my program to read a larger array ??
Hi:

I have this program that reads from an array to do calculations. The array are just t

phpmailer class & pop.gmail.com?
Code: <?php
$mail->IsSMTP();
$mail->Host = "pop.gmail.com";

get multiple rows
Hi I want to get multiple rows from a db

I am using this for the db query
Code: public

PHP Script runs on CLI but not through web browser
I am running into an issue that I just can't seem to find the answer to. I have a Windows Server 200

Page doesn't expand for content
Hi. I've been testing a query I made. It's here http://lapr1.6te.net/inquerito.php
The page doesn

connect() succeeds but accept() does not?
Please help me with this problem. I'm working on a time-sensitive project where I'm using TCP socket

Forms Authentication and Refresh at Login page
Hello, When I try to press the Login button in my webapplication at my login.aspx page nothing h

Why is this function returning a false value when it shouldn't be??
This is in an include file. I want it to check a value in an html form and see if it's just white s

how make 2 column in table with data tybe long row
hi every one

I want make in my table 2 column with data tybe long raw

how thi

Join Query Help
Hi all,

I am having problems with the below code, which we shall call 'my first join query'!

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