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

Posted by tawanda chikwavaire
tawanda chikwavaire
7,613 Points

Use the trim function to remove blank spaces and verify that the value is not an EMPTY word.

<?php session_start(); $word1 = htmlspecialchars($_SESSION['word'][1]); if (!isset($_SESSION['word'][1])) { header('location: /play.php?p=1'); exit; } $word2 = htmlspecialchars($_SESSION['word'][2]); if (!isset($_SESSION['word'][2])) { header('location: /play.php?p=2'); exit; } $word3 = htmlspecialchars($_SESSION['word'][3]); if (!isset($_SESSION['word'][3])) { header('location: /play.php?p=3'); exit; } $word4 = htmlspecialchars($_SESSION['word'][4]); if (!isset($_SESSION['word'][4])) { header('location: /play.php?p=4'); exit; } $word5 = htmlspecialchars($_SESSION['word'][5]); if (!isset($_SESSION['word'][5])) { header('location: /play.php?p=5'); exit; } 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';

story.php 
<?php session_start();

if(empty(trim(($SESSION['word'][1])))){ header('Location: play.php?p=1'); exit; }
else if(empty(trim(($SESSION['word'][2])))){ header('Location: play.php?p=2'); exit; }
else if(empty(trim(($_SESSION['word'][3])))){ header('Location: play.php?p=3'); exit; }
else if(empty(trim(($SESSION['word'][4])))){ header('Location: play.php?p=4'); exit; }
else if(empty(trim(($SESSION['word'][5])))){ header('Location: play.php?p=5'); exit; }
$word1 = htmlspecialchars($SESSION['word'][1]); 
$word2 = htmlspecialchars($_SESSION['word'][2]);
$word3 = htmlspecialchars($_SESSION['word'][3]); 
$word4 = htmlspecialchars($SESSION['word'][4]);
$word5 = htmlspecialchars($_SESSION['word'][5]);

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';

2 Answers

Patrik Horváth
Patrik Horváth
11,110 Points
Patrik Horváth
Patrik Horváth
11,110 Points

There is a lot of solutions here is my :)

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

if (isset($_SESSION['word'][1]) && isset($_SESSION['word'][2]) && isset($_SESSION['word'][3]) && isset($_SESSION['word'][4]) && isset($_SESSION['word'][5]) ) {

  for($i = 1; $i <= 5; $i++) {
   if (strlen($str) > 0 && strlen(trim($str)) == 0) {
      header('Location: play.php?p=');
    }
   $_SESSION['word'][i] = str_replace(' ', '', $string);
   empty($_SESSION['word'][i]);
  }

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'; 
} else {
 if (empty($_SESSION['word'][1])) {
 header('Location: play.php?p=1');
 } else if (empty($_SESSION['word'][2])) {
 header('Location: play.php?$p=2');
 } else if (empty($_SESSION['word'][3])) {
 header('Location: play.php?p=3');
 } else if (empty($_SESSION['word'][4])) {
 header('Location: play.php?p=4');
 } else if (empty($_SESSION['word'][5])){
   header('Location: play.php?p=5');
 }
}
Daniel LittleThunder
Daniel LittleThunder
6,975 Points
Daniel LittleThunder
Daniel LittleThunder
6,975 Points

That's a lot of code to go through for a task. If you set a variable in your for loop in the previous exercise, all you have to do is add a second argument to the conditional in order to also check for the trim. The code below worked for me and simply built off of the previous code.

for ($s = 1; $s <= 5; $s++) {
 if (empty($_SESSION['word'][$s]) && trim($_SESSION['word'][$s] == FALSE)) {
   header("location:story.php?p=$s");
   exit;
 }
}

I hope this helped. Another pointer is that in the first exercise, the !isset handling function worked for me inside of the conditional, but in the second one I had to change it to the empty function to pass. I'm not sure why.