Can't find the problem (no error message)!

Posted on 16th Feb 2014 by admin

OK, here's the deal. This code is really weirdly formatted (sorry!) and hard to understand, so I'm going to try and make it as easy as possible. Here's a breakdown of what the user should do:

1. The user sees a list of his classes (stored in the classes table in the DB). He picks one.
Code: [Select]$instructor = $_COOKIE['USERNAME'];
$query = ("SELECT * FROM classes WHERE instructor='$instructor'");

$sql = mysql_query($query) or die(mysql_error());

echo '<form action="'.$_SERVER['PHP_SELF'].'" method="post">
<table border="1" cellspacing="2" cellpadding="3">';
while ($row = mysql_fetch_array($sql))
{

echo '<tr><td>';
echo $row['id'];
echo '</td><td>';
echo $row['session'];
echo '</td><td>';
echo $row['day'];
echo '</td><td>';
echo $row['time'];
echo '</td><td>';
echo $row['level'];
echo '</td><td>';

$class_id = $row['id'];

echo '<input type = "hidden" name = "class_id" value = "'.$class_id.'" />';
echo '<input type = "submit" name = "pickclass" value = "Run" /></form>';
echo '</td></tr>';
}

echo '</table>';
2. The user is shown a list of the students in that class. He picks one.
Code: [Select] if (isset($_POST['pickclass'])) {



echo '<table>';

$class_id = $_POST['class_id'];

echo '<form action="'.$_SERVER['PHP_SELF'].'" method="post">';

echo '<tr><td><strong>Instructor:&nbsp;</td></tr></table>';



echo $_COOKIE['USERNAME'];

$instructor = $_COOKIE['USERNAME'];


echo '<table border="1" cellspacing="2" cellpadding="3">';


echo '<tr><td>ID</td><td>First</td><td>Last</td><td>Gender</td><td>Level</td></tr>';

$query = ("SELECT * FROM `students` WHERE classid='$class_id' LIMIT 0, 30");

$sql = mysql_query($query) or die(mysql_error());


while ($row = mysql_fetch_array($sql)) {

echo '<tr><td>';
echo $row['id'];
echo '</td><td>';
echo $row['fname'];
echo '</td><td>';
echo $row['lname'];
echo '</td><td>';
echo $row['gender'];
echo '</td><td>';
echo $row['level'];
echo '</td><td>';

echo '<input type = "hidden" name = "id" value = "'.$row['id'].'" />';
echo '<input type = "hidden" name = "fname" value = "'.$row['fname'].'" />';
echo '<input type = "hidden" name = "lname" value = "'.$row['lname'].'" />';
echo '<input type = "hidden" name = "gender" value = "'.$row['gender'].'" />';
echo '<input type = "hidden" name = "level" value = "'.$row['level'].'" />';
echo '<input type = "submit" name = "submit" value = "GO!" /></td></tr></table></form>';


Here's the problem: the only thing showing up under step two is the table headers (i.e. First, Last, etc.)
I don't know why. I feel like it's a tiny problem but I can't find it! Help!

----

In reality, the code looks like this. Don't hurt me!
Code: [Select]//something else comes before this
else

{
if (isset($_POST['pickclass'])) {



echo '<table>';

$class_id = $_POST['class_id'];

echo '<form action="'.$_SERVER['PHP_SELF'].'" method="post">';

echo '<tr><td><strong>Instructor:&nbsp;</td></tr></table>';



echo $_COOKIE['USERNAME'];

$instructor = $_COOKIE['USERNAME'];


echo '<table border="1" cellspacing="2" cellpadding="3">';


echo '<tr><td>ID</td><td>First</td><td>Last</td><td>Gender</td><td>Level</td></tr>';

$query = ("SELECT * FROM `students` WHERE classid='$class_id' LIMIT 0, 30");

$sql = mysql_query($query) or die(mysql_error());


while ($row = mysql_fetch_array($sql)) {

echo '<tr><td>';
echo $row['id'];
echo '</td><td>';
echo $row['fname'];
echo '</td><td>';
echo $row['lname'];
echo '</td><td>';
echo $row['gender'];
echo '</td><td>';
echo $row['level'];
echo '</td><td>';

echo '<input type = "hidden" name = "id" value = "'.$row['id'].'" />';
echo '<input type = "hidden" name = "fname" value = "'.$row['fname'].'" />';
echo '<input type = "hidden" name = "lname" value = "'.$row['lname'].'" />';
echo '<input type = "hidden" name = "gender" value = "'.$row['gender'].'" />';
echo '<input type = "hidden" name = "level" value = "'.$row['level'].'" />';
echo '<input type = "submit" name = "submit" value = "GO!" /></td></tr></table></form>';