CS 4312 Lab 18

CS 4312 - Lab 18

Description:

The code for the form to be utilized for this assignment is shown below. This needs to be saved as a PHP file (e.g., lab18_form.php).

<!--
  Mark Motl
  CS 4312
  Lab 18
-->
<?php
/* Check the protocol for this request. Redirect an HTTP request to
   an HTTPS request.
   Ref.: https://stackoverflow.com/questions/5106313/redirecting-from-http-to-https-with-php
*/
  if (empty($_SERVER['HTTPS']) || $_SERVER['HTTPS'] === "off")
  {
    $location = 'https://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
    header('HTTP/1.1 301 Moved Permanently');
    header('Location: ' . $location);
    exit;
  }
?>
<!DOCTYPE html>
<html lang="en">
<head>
<title>Lab 18 Determine Date Given Day Number and Year</title>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
</head>
<body>
<h1>Lab 18 Determine Date Given Day Number and Year</h1>

<p>
This form allows a user to enter the day number and year of a date.  The
associated PHP application determines the month and day of the date.
</p>

<form action="lab18.php" method="post">
<p>
Enter the day number
<input type="text" name="dayNumber" size="3" maxlength="3" /><br /><br />
</p>

<p>
Enter the year
<input type="text" name="year" size="4" maxlength="4" /><br /><br />
</p>

<p>
<input type="reset"  value="Clear Form" />
<input type="submit" name="Submit" value="Submit This Form" />
</p>
</form>

<p>
<?php 
  $location = 'https://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
  $location = urlencode($location);
  echo '<a href="https://validator.w3.org/nu/?doc=' . $location . '">';
?>
  <img src="https://www.w3.org/QA/Tools/I_heart_validator"
   alt="I heart Validator logo" height="31" width="80" />
</a>
</p>

</body>
</html>

Your program must work when it is invoked through a form using the POST method: lab18_form.php
Your program must also work when it is invoked through a URL using the GET method:

Time of Request: Thu 2 Apr 2026 04:04:11 PM CDT
Mark B. Motl
Mark.Motl@angelo.edu