0

I am creating the Simple Blog from PHP for absolute beginners book. I have worked through the book and my only error now occurs when I am logged in as the admin and try to Post a Blog. The errors I get are:
Warning: array_push() expects parameter 1 to be array, boolean given in C:\xampp\htdocs\simple_blog\inc\functions.inc.php

Warning: array_pop() expects parameter 1 to be array, boolean given in C:\xampp\htdocs\simple_blog\index.php

And this error where the entry I created should be:
Warning: Invalid argument supplied for foreach() in C:\xampp\htdocs\simple_blog\index.php

here is my index.php code:

<?php

    error_reporting(E_ALL);
    ini_set('display_errors', 2);
    session_start();

    /*
     * Include the necessary files
     */
    include_once 'inc/functions.inc.php';
    include_once 'inc/db.inc.php';

    // Open a database connection
    $db = new PDO(DB_INFO, DB_USER, DB_PASS);

    // Figure out what page is being requested (default is blog)
    if(isset($_GET['page']))
    {
        $page = htmlentities(strip_tags($_GET['page']));
    }
    else
    {
        $page = 'blog';
    }

    // Determine if an entry URL was passed
    $url = (isset($_GET['url'])) ? $_GET['url'] : NULL;

    // Load the entries
    $e = retrieveEntries($db, $page, $url);

    // Get the fulldisp flag and remove it from the array
    $fulldisp = array_pop($e);

    // Sanitize the entry data
    $e = sanitizeData($e);

?>
<!DOCTYPE html
    PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">

<head>
    <meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
    <link rel="stylesheet" href="/simple_blog/css/default.css" type="text/css" />
    <link rel="alternate" type="application/rss+xml" 
        title="My Simple Blog - RSS 2.0" 
        href="/simple_blog/feeds/rss.php" />
    <title> Simple Blog </title>
</head>

<body>

    <h1> Simple Blog Application </h1>
    <ul id="menu">
        <li><a href="/simple_blog/blog/">Blog</a></li>
        <li><a href="/simple_blog/about/">About the Author</a></li>
    </ul>
	
<?php if(isset($_SESSION['loggedin']) && $_SESSION['loggedin'] == 1): ?>
    <p id="control_panel">
        You are logged in!
        <a href="/simple_blog/inc/update.inc.php?action=logout">Log
            out</a>.
    </p>
<?php endif; ?>

    <div id="entries">

<?php

// If the full display flag is set, show the entry
if($fulldisp==1)
{

	// Get the URL if one wasn't passed
    $url = (isset($url)) ? $url : $e['url'];

	if(isset($_SESSION['loggedin']) && $_SESSION['loggedin'] == 1)
    {
        // Build the admin links
        $admin = adminLinks($page, $url);
    }
    else
    {
    	$admin = array('edit'=>NULL, 'delete'=>NULL);
    }
	
    if($page=='blog')
    {
        // Load the comment object
        include_once 'inc/comments.inc.php';
        $comments = new Comments();
        $comment_disp = $comments->showComments($e['id']);
        $comment_form = $comments->showCommentForm($e['id']);
		
    }
    else
    {
        $comment_form = NULL;
    }
?>

        <h2> <?php echo $e['title'] ?> </h2>
        <p> <?php echo $e['entry'] ?> </p>
        <p>
            <?php echo $admin['edit'] ?>
            <?php if($page=='blog') echo $admin['delete'] ?>
        </p>
        <?php if($page=='blog'): ?>
        <p class="backlink">
            <a href="./">Back to Latest Entries</a>
        </p>
        <h3> Comments for This Entry </h3>
        <?php echo $comment_disp, $comment_form; endif; ?>

<?php

} // End the if statement

// If the full display flag is 0, format linked entry titles
else
{
    // Loop through each entry
    foreach($e as $entry) {

?>

        <p>
            <a href="/simple_blog/<?php echo $entry['page'] ?>/<?php echo $entry['url'] ?>">
                <?php echo $entry['title'] ?>

            </a>
        </p>

<?php

    } // End the foreach loop
} // End the else

?>

        <p class="backlink">
<?php

if($page=='blog' 
    && isset($_SESSION['loggedin'])
    && $_SESSION['loggedin'] == 1):

?>
            <a href="/simple_blog/admin/<?php echo $page ?>">
                Post a New Entry
            </a>
<?php endif; ?>
        </p>

        <p>
			<a href="/simple_blog/feeds/rss.xml">
                Subscribe via RSS!
            </a>
        </p>

    </div>

</body>

</html>

and my functions.php code:

<?php

function retrieveEntries($db, $page, $url=NULL)
{
    /*
     * If an entry URL was supplied, load the associated entry
     */
    if(isset($url))
    {
        $sql = "SELECT id, page, title, entry, created
                FROM entries
                WHERE url=?
                LIMIT 1";
        $stmt = $db->prepare($sql);
        $stmt->execute(array($url));

        // Save the returned entry array
        $e = $stmt->fetch();

        // Set the fulldisp flag for a single entry
        $fulldisp = 1;
    }

    /*
     * If no entry ID was supplied, load all entry titles for the page
     */
    else
    {
        $sql = "SELECT id, page, title, entry, url, created
                FROM entries
                WHERE page=?
                ORDER BY created DESC";
        $stmt = $db->prepare($sql);
        $stmt->execute(array($page));
    
        $e = NULL; // Declare the variable to avoid errors

        // Loop through returned results and store as an array
        while($row = $stmt->fetch()) {
            if($page=='blog')
            {
                $e[] = $row;
                $fulldisp = 0;
            }
            else
            {
                $e = $row;
                $fulldisp = 1;
            }
        }

        /*
         * If no entries were returned, display a default
         * message and set the fulldisp flag to display a
         * single entry
         */
        if(!is_array($e))
        {
            $fulldisp = 1;
            $e = array(
                'title' => 'No Entries Yet',
                'entry' => 'This page does not have an entry yet!'
            );
        }
    }

    // Add the $fulldisp flag to the end of the array
    array_push($e, $fulldisp);

    return $e;
}

function confirmDelete($db, $url)
{
	$e = retrieveEntries($db, '', $url);

	return <<<FORM
<form action="/simple_blog/admin.php" method="post">
	<fieldset>
		<legend>Are You Sure?</legend>
		<p>Are you sure you want to delete the entry
		"$e[title]"?
		</p>
		<input type="submit" name="submit" value="Yes" />
		<input type="submit" name="submit" value="No" />
		<input type="hidden" name="action" value="delete" />
		<input type="hidden" name="url" value="$url" />
	</fieldset>
</form>
FORM;
}

function deleteEntry($db, $url)
{
    $sql = "DELETE FROM entries
            WHERE url=?
            LIMIT 1";
    $stmt = $db->prepare($sql);
    return $stmt->execute(array($url));
}

function adminLinks($page, $url)
{
    // Format the link to be followed for each option
    $editURL = "/simple_blog/admin/$page/$url";
    $deleteURL = "/simple_blog/admin/delete/$url";

    // Make a hyperlink and add it to an array
    $admin['edit'] = "<a href=\"$editURL\">edit</a>";
    $admin['delete'] = "<a href=\"$deleteURL\">delete</a>";

    return $admin;
}

function sanitizeData($data)
{
    if(!is_array($data))
    {
        return strip_tags($data, "<a>");
    }
    else
    {
        return array_map('sanitizeData', $data);
    }
}

function makeUrl($title)
{
    $patterns = array(
        '/\s+/',
        '/(?!-)\W+/'
    );
    $replacements = array('-', '');
    return preg_replace($patterns, $replacements, strtolower($title));
}

function createUserForm()
{
	return <<<FORM
<form action="/simple_blog/inc/update.inc.php" method="post">
	<fieldset>
		<legend>Create a New Administrator</legend>
		<label>Username
			<input type="text" name="username" maxlength="75" />
		</label>
		<label>Password
			<input type="password" name="password" />
		</label>
		<input type="submit" name="submit" value="Create" />
		<input type="submit" name="submit" value="Cancel" />
		<input type="hidden" name="action" value="createuser" />
	</fieldset>
</form>
FORM;
}

?>
3
Contributors
4
Replies
9
Views
5 Years
Discussion Span
Last Post by safety1g
0

Hi,

In functions.php -> retrieveEntries().

Before the statement

return $e;

,
use the following code to do the debug.

var_dump($e);

You are getting the error coz the $e returned from the function is not an array.
Also try to add some echo statements in the if{} else{} conditions in the function to check if you are getting the correct data at each step.

Hope this helps.

0

Thanks for the response, unfortunately that didn't solve the problem but actually caused the page to now load with this:

array(6) { [0]=> array(12) { ["id"]=> string(2) "14" [0]=> string(2) "14" ["page"]=> string(4) "blog" [1]=> string(4) "blog" ["title"]=> string(11) "Sixth Entry" [2]=> string(11) "Sixth Entry" ["entry"]=> string(13) "More entries!" [3]=> string(13) "More entries!" ["url"]=> string(11) "sixth-entry" [4]=> string(11) "sixth-entry" ["created"]=> string(19) "2011-11-21 17:47:28" [5]=> string(19) "2011-11-21 17:47:28" } [1]=> array(12) { ["id"]=> string(2) "13" [0]=> string(2) "13" ["page"]=> string(4) "blog" [1]=> string(4) "blog" ["title"]=> string(11) "Fifth Entry" [2]=> string(11) "Fifth Entry" ["entry"]=> string(21) "Testing another entry" [3]=> string(21) "Testing another entry" ["url"]=> string(11) "fifth-entry" [4]=> string(11) "fifth-entry" ["created"]=> string(19) "2011-11-21 17:46:01" [5]=> string(19) "2011-11-21 17:46:01" } [2]=> array(12) { ["id"]=> string(2) "12" [0]=> string(2) "12" ["page"]=> string(4) "blog" [1]=> string(4) "blog" ["title"]=> string(11) "Forth Entry" [2]=> string(11) "Forth Entry" ["entry"]=> string(82) "Another day, another entry!!! Editing today!! Editing now logged in as the admin." [3]=> string(82) "Another day, another entry!!! Editing today!! Editing now logged in as the admin." ["url"]=> string(11) "forth-entry" [4]=> string(11) "forth-entry" ["created"]=> string(19) "2011-11-15 12:20:20" [5]=> string(19) "2011-11-15 12:20:20" } [3]=> array(12) { ["id"]=> string(2) "11" [0]=> string(2) "11" ["page"]=> string(4) "blog" [1]=> string(4) "blog" ["title"]=> string(11) "Third Entry" [2]=> string(11) "Third Entry" ["entry"]=> string(28) "Third time is the charm :-)!" [3]=> string(28) "Third time is the charm :-)!" ["url"]=> string(11) "third-entry" [4]=> string(11) "third-entry" ["created"]=> string(19) "2011-11-15 12:17:09" [5]=> string(19) "2011-11-15 12:17:09" } [4]=> array(12) { ["id"]=> string(1) "3" [0]=> string(1) "3" ["page"]=> string(4) "blog" [1]=> string(4) "blog" ["title"]=> string(12) "Second Entry" [2]=> string(12) "Second Entry" ["entry"]=> string(31) "Trying again yet another entry!" [3]=> string(31) "Trying again yet another entry!" ["url"]=> string(12) "second-entry" [4]=> string(12) "second-entry" ["created"]=> string(19) "2011-11-07 18:45:48" [5]=> string(19) "2011-11-07 18:45:48" } [5]=> array(12) { ["id"]=> string(1) "2" [0]=> string(1) "2" ["page"]=> string(4) "blog" [1]=> string(4) "blog" ["title"]=> string(11) "First Entry" [2]=> string(11) "First Entry" ["entry"]=> string(37) "This is going to be a long project!!!" [3]=> string(37) "This is going to be a long project!!!" ["url"]=> string(11) "first-entry" [4]=> string(11) "first-entry" ["created"]=> string(19) "2011-11-06 11:09:58" [5]=> string(19) "2011-11-06 11:09:58" } }

Should I add if{} else{} statements around this part in functions.inc.php:

array_push($e, $fulldisp);

    return $e;

Or where do you suggest adding them?

0

Hmm, that is strange because the error says that the parameter1 you are passing to array_push() is not an array but boolean. Even the other errors concerning to array_pop() and foreach() statement convey the same.

0

I'm getting the same problem. Must be an error in the code in the book. Can anyone shed any light on this? I'm very stuck thanks

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