I'm almost finished with my first college PHP assignment. It's been a headache but I'm in the homestretch. The problem I'm having now is with validation. I have validated that the input boxes contain appropriate data. The instructions tell me to make certain that if the user hits the "confirm" button with no data entered, the user will be redirected back to the index.php (the same page). Right now the user can click "confirm" and, even if the input boxes are empty, it will direct them to the next page. I've tried multiple ways with no success. I've commented out the latest attempt. I'm confused by a lot of the examples I've finding online because they also include validation that I've already done. I'm also finding a lot of examples that use JavaScript. I must use PHP for all validation. Help will be very much appreciated.
I have updated my code now that I have it working. But another issue has been created. The error messages are appearing next to the input boxes before data is even entered .. rather than appearing after submitting the page with missing or inaccurate data.
<?php
/*
* Course : Server-Side Programming
* Student: Sherrie Teague
* Assignment: HW2 - Quote
* Date : 2/6/2019
*/
// get the data from the form
$sales_price = filter_input(INPUT_POST,'sales_price', FILTER_VALIDATE_FLOAT);
$discount_percent = filter_input(INPUT_POST,'discount_percent',FILTER_VALIDATE_FLOAT);
$total_price = filter_input(INPUT_POST,'total_price', FILTER_VALIDATE_FLOAT);
/*// validate sales_price
if ($sales_price === FALSE) {
$sales_priceError = 'Sales price must be a valid amount';
} else if ($sales_price < 1.0) {
$sales_priceError = 'Sales price must be greater than 0';
} else {
$sales_priceError = '';
}
// validate discount_percent
if ($discount_percent === FALSE) {
$discount_percentError = 'Discount percent must be a valid amount';
} else if ($discount_percent < 1.0) {
$discount_percentError = 'Discount percent must be greater than 0';
} else {
$discount_percentError = '';
}*/
if( isset( $_POST['confirmSubmit'] )) {
echo 'Validation Error';
// or store it in a variable and post later
$validation_error = 'Validation Error';
}
$sales_valid = true;
$sales_priceError = '';
if ($sales_price === FALSE) {
$sales_priceError = 'Sales price must be a valid amount';
$sales_valid = false;
} else if ($sales_price < 1.0) {
$sales_priceError = 'Sales price must be greater than 0';
$sales_valid = false;
}
$discount_valid = true;
$discount_percentError = '';
// validate discount_percent
if ($discount_percent === FALSE) {
$discount_percentError = 'Discount percent must be a valid amount';
$discount_valid = false;
} else if ($discount_percent < 1.0) {
$discount_percentError = 'Discount percent must be greater than 0';
$discount_valid = false;
}
// calculate the discount and the discounted price
$discount_amount = $sales_price * $discount_percent / 100;
$total_price = $sales_price - $discount_amount;
?>
<!doctype html>
<html lang="en">
<head>
<title>Quote</title>
<link rel="stylesheet" type="text/css" href="quote.css">
</head>
<body>
<section>
<h1>Price Quotation</h1>
<form id="priceForm" name="priceForm" method="post" action=''>
<label for="sales_price">Sales Price </label>
<input type="text" id="sales_price" name="sales_price" required
value="<?php echo $sales_price; ?>"/>
<?php if (!empty($sales_priceError)) : ?>
<span style="color:red;background-color: white">
<?php echo $sales_priceError; ?>
</span>
<?php endif; ?>
<br/>
<br/>
<label for="discount_percent">Discount Percent </label>
<input type="text" id="discount_percent" name="discount_percent" required
value="<?php echo $discount_percent; ?>"/>
<?php if (!empty($discount_percentError)) : ?>
<span style="color:red;background-color: white">
<?php echo $discount_percentError; ?>
</span>
<?php endif; ?>
<p class="discount">Discount Amount <?php echo ' $' . number_format($discount_amount, 2); ?></p>
<p class="total">Total Price <?php echo ' $' . number_format($total_price, 2); ?></p>
<input type="submit" class=inline name="submitButton" id="submitButton" value="Calculate"/>
</form>
<!-- <form id="confirmForm" name="confirmForm" method="post" action="confirm.php">-->
<form id="confirmForm" name="confirmForm" method="post" action="<?php echo ( ( $sales_valid && $discount_valid ) ? 'confirm.php' : '' ); ?>">
<input type="hidden" id="sales_price" name="sales_price" value="<?php echo $sales_price ?>" />
<input type="hidden" id="discount_amount" name="discount_amount" value="<?php echo $discount_amount ?>"/>
<input type="hidden" id="total_price" name="total_price" value="<?php echo $total_price ?>"/>
<input type="submit" class= inline name="confirmSubmit" id="confirmSubmit" value="Confirm"/>
</form>
<div>
<p> Enter price and discount amount and click Calculate</p>
</div>
</section>
</body>
</html>
