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 $_POST['tax'];?>"/>(optional)</p>
<p><input type="submit" name"submit" value="Calculate!"/></p>
<input type="hidden" name"submitted" value="TRUE"/>
</form>
<?php
include ('./footer.html');
?>The calculator does not work and won't display anything. I've checked the code three times in the text book and I believe their is no typo's. What am I doing wrong?
No comments posted yet
Your Answer:
Login to answer
68 24
Other forums
Character increment
Hi,
I am facing a scenario like above,but in my case i want to show up like Col A,Col B etc..
Preloading images
Posting this question here because I am not sure where this should belong.I am building an asp.net a
Remove values in array2 from array1
I have two arrays.
Array 1 is where the array key holds various different numbers. For exampl
Need some ideas as to how to go about sorting this array...
Here's how the array's are created..
Code: <?php
while ($x = readdir($dp)) {
Please Help my PHP Dating Function.
Hi everyone!
Well here is my code that displays this:
It works wonderful.
unoconv doc convert to pdf code prob
PHP/5.3.1
Hi. I am trying to use this code to convert docs to .pdf utilizing unoconv. Howe
matching numbers inside ( )
I know I can match numbers by just [0-9]+, so I thought matching numbers inside ( ) would be somethi
Navigation include for all site directories
Hi,
I need a navigation include that can deal with directories at different levels on a site.
uploading video files into mysql in php
hi,
I have the video files which i have to upload into mysql db. along with creating thumbnails f
Count
Getting the same count everytime
Code:
$visitquery = mysql_query("SELECT COUNT(*) FR