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

Posted by Andrew mwendo
Andrew mwendo
5,712 Points

help guys my last challenge

Challenge Task 2 of 2

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

story.php 
<?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';

4 Answers

Victor Cooke
Victor Cooke
35,162 Points
Victor Cooke
Victor Cooke
35,162 Points

My solution below (though not the best in term of repetitions, it worked)

session_start();
if(empty($_SESSION['word'][1])){
 header('Location: play.php?p=1');
  exit;
}else if(empty($_SESSION['word'][2])){
 header('Location: play.php?p=2');
  exit;
}else if(empty($_SESSION['word'][3])){
 header('Location: play.php?p=3');
  exit;
}else if(empty($_SESSION['word'][4])){
 header('Location: play.php?p=4');
  exit;
}else if(empty($_SESSION['word'][5])){
 header('Location: play.php?p=5');
  exit;
}

$word1 = htmlspecialchars(trim($_SESSION['word'][1]));
$word2 = htmlspecialchars(trim($_SESSION['word'][2]));
$word3 = htmlspecialchars(trim($_SESSION['word'][3]));
$word4 = htmlspecialchars(trim($_SESSION['word'][4]));
$word5 = htmlspecialchars(trim($_SESSION['word'][5]));
zacharym
zacharym
11,154 Points
zacharym
zacharym
11,154 Points

I was a little confused by this, the question makes it sound like you have to use the trim function to check for an empty word. I solved it by changing all of the '!isset' to 'empty', eg:

if (empty($_SESSION['word'][2]))
Andrew mwendo
Andrew mwendo
5,712 Points

this this what you mean it won't pass

<?php session_start(); $word1 = htmlspecialchars($_SESSION['word'][1]); if (empty($_SESSION['word'][1])) { header('location: /play.php?p=1'); exit; }

cossy
cossy
17,748 Points
cossy
cossy
17,748 Points

this will work for such challenge

<?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';

Tatenda Anesu Madharani
Tatenda Anesu Madharani
6,953 Points
Tatenda Anesu Madharani
Tatenda Anesu Madharani
6,953 Points

This is the correct answer

<?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]);

for ($i = 1; $i <= 5; $i++) { $tmp = trim($_SESSION['word'][$i]); if (empty($tmp)) { if ($i == 1) { header('location:play.php'); exit; } else { header('location:play.php?p='.$i); 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';