This is my class assignment. Looks good but it doesn’t show error messages or calculate.
[php]
<?php # Script 3.5 - calculator.php $page_title = 'Trip Cost Calculator'; include ('includes/header.html'); // Check for form submission; if($_Server['REQUEST_METHOD'] == 'POST') { //Minimal form validation if (isset($_POST['distance'], $_POST['gallon_price'], $_POST['efficiency']) && is_numeric($_POST['distance']) && is_numeric($_POST['gallon_price']) && is_numeric($POST['efficiency']) ) { //Calculate the results: $gallons = $_POST['distance'] / $_POST['efficiency']; $dollars = $gallons * $_POST['gallon_price']; $hours = $_POST['distance']/ 65; //Print the results: echo 'Total Estimated Costs
The total cost of driving ' . $_POST['distance'] . ' miles, averaging ' . $_POST ['efficiency'] . ' miles per gallon, and paying an average of $' . $_POST['gallon_price'] . ' per gallon, is $' . number_format($dollars, 2) . '. If you drive at an average of 65 miles per hour, the trip will take approximately ' . number_format($hours, 2) . ' hours.
'; } else { //Invalid submitted values. echo 'Error!
Please enter a valid distance, price per gallon, and fuel efficiency.
'; } } //End of main submission IF. //Leave the PHP section and create the HTML form: ?><h1>Trip Cost Calculator</h1>
<form action="calculator.php" method="post">
<p>Distance (in miles): <input type="text" name="distance" /></p>
<p>Ave. Price Per Gallon: <span class="input">
<input type="radio" name="gallon_price" value="3.00" /> 3.00
<input type="radio" name="gallon_price" value="3.50" /> 3.50
<input type="radio" name="gallon_price" value="4.00" /> 4.00
</span></p>
<p>Fuel Efficiency: <select name="efficiency">
<option value="10">Terrible</option>
<option value="20">Decent</option>
<option value="30">Very Good</option>
<option value="50">Outstanding</option>
</select></p>
<p><input type="submit" name="submit" value="Calculate!" /></p>
</form>
<?php include ('includes/footer.html'); ?>
[/php]