Undefined index: type

jimad12 · February 20th, 2012, 04:56 PM

Hello can anyone help I ve been getting the following error message and I don't know how to fix it. I don't have no parse errors or mistakes.

the error is for delete.php in chapter 6 page 164. Whenever, I try to delete a record in admin.php I get the message below.

Notice: Undefined index: type in /Applications/MAMP/htdocs/php_6/chap6/delete.php on line 6

also the echo strings for "Are you sure you want to delete this movie?" does show up and the strings for "your movie has been deleted. Return to Index" doesn't show up as well. Thanks

here is the code for delete.php

Code:

<?php 
$db = mysql_connect('localhost', 'xmx', 'xcv') or die('Unable to connect. Check your parameters.');
mysql_select_db('moviesite', $db) or die(mysql_error($db));

if (! isset($_GET['do']) || $_GET['do'] != 1) {
    switch ($_GET['type']) {
      
    case 'movie':
        echo 'Are you sure you want to delete this movie?<br/>';
        break;
    case 'people':
        echo 'Are you sure you want to delete this person?<br/>';
        break;
    }
  echo '<a href="' . $_SERVER['REQUEST_URI'] . '&do=1">yes</a>';
  echo 'or <a href="admin.php">no</a>';
} else {
  switch ($_GET['type']) {
    case 'people' :
    $query = 'UPDATE movie SET movie_leadactor = 0 WHERE movie_leadactor ' . $_GET['id'];
    $result = mysql_query($query, $db) or die(mysql_error($db));
    
    $query = 'DELETE FROM people WHERE people_id = ' . $_GET['id'];
    $result = mysql_query($query, $db) or die(mysql_error($db));
    ?>
    <p style="text-align: center;">Your person has been delete.<a href="movie_index.php">Return to Index</a></p>
    <?php
    break;
    case 'movie':
    $query = 'DELETE FROM movie WHERE movie_id = ' . $_GET['id'];
    $result = mysql_query($query, $db) or die(mysql_error($db));
    ?>
    <p style="text-align: center;">Your movie has been delete.<a href="movie_index.php">Return to Index</a></p> 
    <?php
    break;
  }
}
?>

UseLess · February 20th, 2012, 05:23 PM

Greetings,

When the script is called it expects parameters so using this:

delete.php

will result in errors as the script expects to be called like this:

delete.php?type=movie&id=2

Upon first calling the script the parameter 'do' is not set so you get asked the question, based on the supplied 'type', are you sure you want to delete the record. At which point 'do' is added to the URL, with the following line:

Code:

echo '<a href="' . $_SERVER['REQUEST_URI'] . '&do=1">yes</a>';

and set to 1 therefore when 'Yes' is clicked the appropriate record is then deleted as the code in the 'else' is ran as 'do' isset and it is set to 1 so the 'if', this bit:

Code:

if (! isset($_GET['do']) || $_GET['do'] != 1)

does not equate to true so the code in the 'else' section is ran.

So you'll need to check the file that links to the delete.php file and make sure the links have the parameters applied correctly.

jimad12 · February 20th, 2012, 06:09 PM

Hello, I'd like to thank you very much base on your explanations I figured out what the problem was.

The mistake was in admin.php I had

Code:

<a href="delete.php?action =movie&id=' .

instead of

Code:

<a href="delete.php?type=movie&id='

.

Thanks again

Luachan · September 22nd, 2014, 04:55 PM

Hi guys,
I have a problem with delete.php file: I can't delete the item choosen (Test movie). In fact, when I click DELETE in the admin.php file, nothing happens to the item.

The code of delete.php is the following:

Code:

<?php
	$db = mysql_connect('localhost', 'bp6am', 'bp6ampass')or
		die ('Unable to connect. Check your connection parameters.');
	mysql_select_db('moviesite', $db) or die (mysql_error($db));
	
	if (!isset($_GET['do']) || $_GET['do'] != 1) {
		switch ($_GET['type']) {
			case 'movie':
				echo 'Are you sure you want to delete this movie?<br />';
				break;
			case 'people':
				echo 'Are you sure you want to delete this person?<br />';
				break;
			}
			echo '<a href="' . $_SERVER['REQUEST_URI'] . '&do=1">yes</a>';
			echo ' or <a href="admin.php">no</a>';
	} else {
		switch ($_GET['type']) {
			case 'people':
				$query = 'UPDATE movie SET
							movie_leadactor = 0
						WHERE
							movie_leadactor =' . $_GET['id'];
				$result = mysql_query($query, $db) or die (mysql_error($db));
				
				$query = 'DELETE FROM people
						WHERE
							people_id =' . $_GET['id'];
				$result = mysql_query($query, $db) or die (mysql_error($db));
?>
<p style="text-align: center;">Your movie has been deleted. <a href="movie_index.php">Return do Index</a></p>
<?php
		break;
	}
}	
?>

and the code of admin.php is

Code:

<?php
	$db = mysql_connect('localhost', 'bp6am', 'bp6ampass') or 
		die ('Unable to connect. Check your database parameters');
	
	mysql_select_db('moviesite', $db) or die (mysql_error($db));
?>
<html>
	<head>
		<title>Movie database</title>
		<style type="text/css">
			th { background: #999; }
			.odd_row { background: #eee; }
			.even_row { background: #fff; }
		</style>
	</head>
<body>
<table style="width: 100%;">
	<tr>	
		<th colspan="2">Movies <a href="movie.php?action=add">[ADD]</a></th>
	</tr>
	<?php
		$query = 'SELECT * FROM movie';
		$result = mysql_query($query, $db) or die (mysql_error($db));
		
		$odd = true;
		while ($row = mysql_fetch_assoc($result)) {
			echo ($odd == true) ? '<tr class="odd_row">' : '<tr class="even_row">';
			$odd = !$odd;
			echo '<td style="width: 75%;">';
			echo $row['movie_name'];
			echo '</td><td>';
			echo '<a href="movie.php?action=edit&id=' . $row['movie_id'] . '">[EDIT]</a>';
			echo '<a href="delete.php?type=movie&id=' . $row['movie_id'] . '">[DELETE]</a>';
			echo '</td></tr>';
		}
	?>
	<tr>
		<th colspan="2">People <a href="people.php?action=add">[ADD]</a></th>
	</tr>
	<?php
	$query = 'SELECT * FROM people';
	$result = mysql_query($query, $db) or die (mysql_error($db));
	
	$odd = true;
		while ($row = mysql_fetch_assoc($result)) {
			echo ($odd == true) ? '<tr class="odd_row">' : '<tr class="even_row">';
			$odd = !$odd;
			echo '<td style="width: 25%;">';
			echo $row['people_fullname'];
			echo '</td><td>';
			echo '<a href="people.php?action=edit&id=' . $row['people_id'] . '">[EDIT]</a>';
			echo '<a href="delete.php?type=people&id=' . $row['people_id'] . '">[DELETE]</a>';
			echo '</td></tr>';
		}
	?>
</table>
</body>
</html>

Any solution?

Thanks in advance ;-)

UseLess · September 23rd, 2014, 05:44 AM

Greetings,

In 'delete.php' you DO NOT have any code to handle the delete request. And the code to remove a person has the output line from the movie delete... your switch statement should be like this;

Code:

switch ($_GET['type'])
{
	case 'people':
	// code in here to remove people
	break;
	
	case 'movie':
	// code in here to remove movies
	break;
}

what you have is this;

Code:

switch ($_GET['type'])
{
	case 'people':
	// code in here to remove people
	break;
}

Luachan · September 23rd, 2014, 06:37 AM

Thanks a lot, UseLess.
The code in the book does not run, as you know.

Thanks to your tip, I added the following code and it runs:

Code:

<?php
	       // Break of the 'people' case
               break;
		
                // Start the 'movie' case
		case 'movie':
				$query = 'UPDATE movie SET
							movie_id = 0
						WHERE
							movie_name =' . $_GET['id'];
				$result = mysql_query($query, $db) or die (mysql_error($db));
				
				$query = 'DELETE FROM movie
						WHERE
							movie_id =' . $_GET['id'];
				$result = mysql_query($query, $db) or die (mysql_error($db));
?>
<p style="text-align: center;">Your movie has been deleted. <a href="movie_index.php">Return do Index</a></p>
<?php
		break;
		}
	}
?>

Maybe useful for those who met the same problem ;-)

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