index.php

<script src='https://www.google.com/recaptcha/api.js'></script>
<link rel="stylesheet" href="styles.css"> 
<?php

// Include the secret and site key from a separate file
require 'recaptcha_keys.php';


// Connect to the SQLite database
$db = new PDO('sqlite:poll.db');

// Read the expiry date and poll options from the text file
$lines = file('poll_options.txt', FILE_IGNORE_NEW_LINES);
$expiry_date = strtotime($lines[0]);
$poll_options = array_slice($lines, 1);

// Read the poll question from the text file
$question = file_get_contents('question.txt');

// Check if the poll has expired
$current_date = time();
if ($current_date > $expiry_date) {
  // Poll has expired
  echo "This poll has expired.";
  exit;
}

// Display the expiry date of the poll
echo "This poll ends at: " . date('l, F j, Y', $expiry_date);

// Display the poll question
echo "<h1>$question</h1>";

// Check if the form has been submitted
if (isset($_POST['submit'])) {
  // Form has been submitted

// Verify the reCaptcha response
$url = 'https://www.google.com/recaptcha/api/siteverify';
$data = array('secret' => $recaptcha_secret, 'response' => $_POST['g-recaptcha-response']);
$options = array(
  'http' => array(
    'header'  => "Content-type: application/x-www-form-urlencoded\r\n",
    'method'  => 'POST',
    'content' => http_build_query($data),
  ),
);
$context  = stream_context_create($options);
$response = file_get_contents($url, false, $context);
$result = json_decode($response);
if ($result->success) {
  // reCaptcha was successful
 // Check if the user has already voted
  $stmt = $db->prepare("SELECT COUNT(*) FROM poll_votes WHERE ip_address = ?");
  $stmt->execute([$_SERVER['REMOTE_ADDR']]);
  $count = $stmt->fetchColumn();
  if ($count > 0) {
    // User has already voted
    echo "<p class='orange'>You have already voted in this poll.</p>";

    exit;
  }
  // Save the vote to the database
  $stmt = $db->prepare("INSERT INTO poll_votes (option_id, ip_address) VALUES (?, ?)");
  $stmt->execute([$_POST['option'], $_SERVER['REMOTE_ADDR']]);

  // Redirect the user to a different page
  header('Location: results.php');
  exit;
} else {
  // reCaptcha was unsuccessful
  // Display an error message
  echo "<p class='orange'>There was an error with the reCaptcha. Please try again.</p>";
  }
}

// Display the poll form
echo "<form method='post'>";
foreach ($poll_options as $id => $option) {
  echo "<input type='radio' name='option' value='$id'> $option<br>";
}
echo "<br>";
echo "<div class='g-recaptcha' data-sitekey='$recaptcha_site_key'></div>";
echo "<input type='hidden' name='expiry_date' value='02/01/2023'>";
echo "<br>";
echo "<input type='submit' name='submit' value='Vote'>";
echo "</form>";

// Display the "View Results" link
// echo "<a href='results.php'>View Results</a>";

?>
<button onclick="location.href='results.php'">View Results</button>
<br>