snafudawn Posted April 15, 2010 Share Posted April 15, 2010 * o Personal Message (Online) undefined index « on: Today at 08:30:24 PM » * Quote Hello all, I'm a newbie to php...2nd semester in and doing an independent study for college. I have debugged the following error several times but...I just can't figure this one out. My complete code follows the error. Thank you, in advance. dawn... Notice: Undefined index: id in C:\wamp\www\joke.php on line 24 Could not locate the specified joke ID. Error line 24 is in bold. <!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"> <head> <title>The Internet Joke Database</title> <meta http-equiv="content-type" content="text/html; charset=iso-8859-1" /> </head> <body> <?php $dbcnx = @mysql_connect('localhost', 'root', 'twyx1124'); if (!$dbcnx) { exit('<p>Unable to connect to the ' . 'database server at this time.</p>'); } if (!@mysql_select_db('ijdb')) { exit('<p>Unable to locate the joke ' . 'database at this time.</p>'); } // Get the joke text from the database $id = $_GET['id']; $joke = @mysql_query("SELECT joketext FROM joke WHERE id='$id'"); if (!$joke) { exit('Unable to load the joke from the database.'); } if (mysql_num_rows($joke) < 1) { exit('Could not locate the specified joke ID.'); } $joke = mysql_fetch_array($joke); $joketext = $joke['joketext']; // Filter out HTML code $joketext = htmlspecialchars($joketext); // If no page specified, default to the first page ($page = 0) if (!isset($_GET['page'])) { $page = 0; } else { $page = $_GET['page']; } // Split the text into an array of pages $textarray = spliti('\[PAGEBREAK]', $joketext); // Select the page we want $joketext = $textarray[$page]; // Bold and italics $joketext = str_replace(array('', ''), '<strong>', $joketext); $PHP_SELF = $_SERVER['PHP_SELF']; if ($page != 0) { $prevpage = $page - 1; echo "<p><a href=\"$PHP_SELF?id=$id&page=$prevpage\">". 'Previous Page</a></p>'; } echo "<p>$joketext</p>"; if ($page < count($textarray) - 1) { $nextpage = $page + 1; echo "<p><a href=\"$PHP_SELF?id=$id&page=$nextpage\">". 'Next Page</a></p>'; } ?> <p><a href="indexJokes.php">Back to the front page</a></p> </body> </html> Link to comment https://forums.phpfreaks.com/topic/198591-undefined-index-modified/ Share on other sites More sharing options...
oni-kun Posted April 15, 2010 Share Posted April 15, 2010 Indexes don't populate themselves. You should be aware of how to handle them if they're not set, especially if they are modified by the users themselves. if (isset($_GET['id'])) { $id = (int)$_GET['id']; } else { $id = 1; //Default, for example. } Link to comment https://forums.phpfreaks.com/topic/198591-undefined-index-modified/#findComment-1042103 Share on other sites More sharing options...
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