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
24
Other forums
Ariba 9r - SAP MM Integration
Hi experts,
The standard Ariba adapter for 9r creates a relationship between Cost Centers
Displaying a record from mysql in a simple swf file
Hi,
I have a mysql database containing information I would like to display in my swf.
PHP doesn't send my mail
Hi all, I found this and used it to send mail. Simple contact form with some required fields. The va
Convert .fdf to .pdf
I currently have a web form that uploads the form data to an .fdf file and emails it.
However
Open/Close Links in Php
Hello, Hoping someone can inform me how I can get PHP to automatically open a set of links in a new
PHP onsubmit in the form not going to the fuction.
I have a form through ‘onsubmit’ calling a function validation(). But not going to the
error reporting
hey everyone
I have a production server in which I want error reporting but only on some page
php/mysql auto logout after 2 hour and reset password
Hi all,
This I hope will make sense. I've the following code which when a user logins in, cr
Binding 2 UDP sockets on same port, connected to different destinations, 1 receives
Hello,
My application wants to send/recv data to 2 different UDP ports on a remote computer, us
[function.file]: failed to open stream: No such file or directory
Okay I wrote this little script to upload a csv file that is located on my webhosts server to a mysq