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PHP Browser Persistent Data with PHP Data Persistence on the Web Checking for Sessions

If the variables are not set, redirect to play.php with the p parameter set to the first missing session variable

I have filtered the get input from the page to get the session variable.

Then checked if the sessions array is set and redirected to the play.php with parameter p set to the session number I got from filter input.

$word1 = htmlspecialchars($_SESSION['word'][1]);
$word2 = htmlspecialchars($_SESSION['word'][2]);
$word3 = htmlspecialchars($_SESSION['word'][3]);
$word4 = htmlspecialchars($_SESSION['word'][4]);
$word5 = htmlspecialchars($_SESSION['word'][5]);

$page = filter_input(INPUT_GET, 'p', FILTER_SANITIZE_NUMBER_INT);

if(!isset($_SESSION['word'])) {
    header("Location: play.php?p=$page");

include 'inc/header.php';

echo '<h1>My Treehouse Story</h1>';

echo '<p>There once was a(n) ' . $word1;
echo ' programmer named ' . $word2; 
echo '. </p>';
echo '<p>This ' .  $word3; 
echo ' programmer used Treehouse to learn to ' . $word4;
echo ' the ' . $word5 . '.</p>';

echo ' <a class="btn btn-default btn-lg" href="#" role="button">Save Story</a>';
echo ' <a class="btn btn-default btn-lg" href="play.php" role="button">Play Again</a>';
echo ' <a class="btn btn-default btn-lg" href="index.php" role="button">Other Stories</a>';

include 'inc/footer.php';

1 Answer

Steven Parker
Steven Parker
227,114 Points

You'll probably want to use a loop to check each word variable in the array individually. Then if any are missing you can set "p" to the index of the specific one.