Jump to content
Larry Ullman's Book Forums
khassan

Chapter 13 Fatal error with is_administrator()

Recommended Posts

Not sure why I keep getting this error? Could someone please help me.

 

This is the code I used for add_quote.php:

 

<?php // Script 13.7 - add_quote.php
/* This script adds a quote. */
// Define a page title and include the header:
define('TITLE', 'Add a Quote');
include('includes/header.php');
print '<h2>Add a Quotation</h2>';
// Restrict access to administrators only:
if (!is_administrator()) {
	print '<h2>Access Denied!</h2><p class="error">You do not have permission to access this page.</p>';
	include('includes/footer.php');
	exit();
}
// Check for a form submission:
if ($_SERVER['REQUEST_METHOD'] == 'POST') { // Handle the form.
	if ( !empty($_POST['quote']) && !empty($_POST['source']) ) {
		// Need the database connection:
		include('includes/mysqli_connect.php');
		// Prepare the values for storing:
		$quote = mysqli_real_escape_string($dbc, trim(strip_tags($_POST['quote'])));
		$source = mysqli_real_escape_string($dbc, trim(strip_tags($_POST['source'])));
		// Create the "favorite" value:
		if (isset($_POST['favorite'])) {
			$favorite = 1;
		} else {
			$favorite = 0;
		}
		$query = "INSERT INTO quotes (quote, source, favorite) VALUES ('$quote', '$source', $favorite)";
		mysqli_query($dbc, $query);
		if (mysqli_affected_rows($dbc) == 1){
			// Print a message:
			print '<p>Your quotation has been stored.</p>';
		} else {
			print '<p class="error">Could not store the quote because:<br>' . mysqli_error($dbc) . '.</p><p>The query being run was: ' . $query . '</p>';
		}
		// Close the connection:
		mysqli_close($dbc);
	} else { // Failed to enter a quotation.
		print '<p class="error">Please enter a quotation and a source!</p>';
	}
} // End of submitted IF.
// Leave PHP and display the form:
?>

<form action="add_quote.php" method="post">
	<p><label>Quote <textarea name="quote" rows="5" cols="30"></textarea></label></p>
	<p><label>Source <input type="text" name="source"></label></p>
	<p><label>Is this a favorite? <input type="checkbox" name="favorite" value="yes"></label></p>
	<p><input type="submit" name="submit" value="Add This Quote!"></p>
</form>

<?php include('includes/footer.php'); 
?>

 

And then the one for functions.php:

<?php // Script 13.2 - functions.php
/* This page defines custom functions. */

// This function checks if the user is an administrator.
// This function takes two optional values.
// This function returns a Boolean value.
function is_administrator($name = 'Samuel', $value = 'Clemens') {

	// Check for the cookie and check its value:
	if (isset($_COOKIE[$name]) && ($_COOKIE[$name] == $value)) {
		return true;
	} else {
		return false;
	}
} // End of is_administrator() function.

 

Could someone please also explain the fact that we had to use Samuel for the $name and Clemens for the $value? I am so confused... I'd really appreciate any clarification! =]

error.JPG

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...

×
×
  • Create New...