Page not displaying retrieved information *solved*

[hostfreak]

I've got a system setup to manage trucks etc. Well when a truck is added, it is assigned to an agent. In the truck table, where the trucks are added, there is a field called id2. The id2 receives the value of the id of the user that it is assigned to. That way it is unique to that user. Well for some reason, when I try to call it to display trucks under that user, it doesn't display anything. No errors etc. Here is my code:

[code]
<?php
include("include/session.php");
if($session->logged_in){
include ("top.txt");
include("include/constants.inc");
?>

<table id="settingstable">
<tr>
<td id="settingstd3">
<a href=amta.php><b><u>A</u></b></a>
<a href=amtb.php><b><u>B</u></b></a>
<a href=amtc.php><b><u>C</u></b></a>
<a href=amtd.php><b><u>D</u></b></a>
<a href=amte.php><b><u>E</u></b></a>
<a href=amtf.php><b><u>F</u></b></a>
<a href=amtg.php><b><u>G</u></b></a>
<a href=amth.php><b><u>H</u></b></a>
<a href=amti.php><b><u>I</u></b></a>
<a href=amtj.php><b><u>J</u></b></a>
<a href=amtk.php><b><u>K</u></b></a>
<a href=amtl.php><b><u>L</u></b></a>
<a href=amtm.php><b><u>M</u></b></a>
<a href=amtn.php><b><u>N</u></b></a>
<a href=amto.php><b><u>O</u></b></a>
<a href=amtp.php><b><u>P</u></b></a>
<a href=amtq.php><b><u>Q</u></b></a>
<a href=amtr.php><b><u>R</u></b></a>
<a href=amts.php><b><u>S</u></b></a>
<a href=amtt.php><b><u>T</u></b></a>
<a href=amtu.php><b><u>U</u></b></a>
<a href=amtv.php><b><u>V</u></b></a>
<a href=amtw.php><b><u>W</u></b></a>
<a href=amtx.php><b><u>X</u></b></a>
<a href=amty.php><b><u>Y</u></b></a>
<a href=amtz.php><b><u>Z</u></b></a>
</td>
</tr>
</table>
<?php
$connection = mysql_connect("$server","$user","$password"); 
mysql_select_db("$database", $connection);

$sql = "SELECT * FROM users WHERE username = '$username'";
$result = mysql_query($sql, $connection) or die(mysql_error());
while ($row = mysql_fetch_array($result)) {
$id_num = $row['id_num'];
}

$sql = "SELECT * FROM trucks";
$result = mysql_query($sql, $connection) or die(mysql_error());
while ($row = mysql_fetch_array($result)) {
$id2 = $row['id2'];
}

$letter = 'A';
$sql = "SELECT * FROM trucks WHERE id2 = '$id_num' AND company LIKE '$letter%' ORDER BY company ASC";
$result = mysql_query($sql, $connection) or die(mysql_error());
while ($row = mysql_fetch_array($result)) {
$company = $row['company'];
$mc = $row['mc'];
?>

<table id="settingstable">
<tr>
<td></td>
<tr>

<tr>
<td id="settingstd1">Company Name:</td>
<td id="settingstd2"><?php echo "$company"; ?></td>
</tr>

<tr>
<td id="settingstd1">MC #:</td>
<td id="settingstd2"><?php echo "$mc"; ?></td>
</tr>

<tr>
<td id="settingstd1">Delete:</td>
<td id="settingstd2"><a href='deltrequest.php'>Delete Truck</a></td>
</tr>

<tr>
<td id="settingstd1">Edit Truck:</td>
<td id="settingstd2"><a href='edittrequest.php'>Edit Truck Information</a></td>
</tr>
</table>

<?php
}
include ("bottom.txt");
}
else { //If the user is not logged in, warn them
$ip = $_SERVER['REMOTE_ADDR'];
echo "You are not authorized to view this page! An email has been dispatched to the administrators to inform them of your whereabouts!<br>Your IP address: <b>$ip</b> , has been recorded and will be reported to the law if this happens again!";
}
?>
[/code]

[king arthur]

Where are you getting the $username variable from?

[hostfreak]

It's defined in session.php

[AndyB]

When in doubt, echo the query to see what it [b]really[/b] is:

[code]$sql = "SELECT * FROM trucks WHERE id2 = '$id_num' AND company LIKE '$letter%' ORDER BY company ASC";
echo "Debug: ". $sql. "<br/>"; // so what is the query exactly?
$result = mysql_query($sql, $connection) or die(mysql_error());[/code]

[hostfreak]

I did what you said Andy, It returned:
Debug: SELECT * FROM trucks WHERE id2 = '' AND company LIKE 'A%' ORDER BY company ASC

So I guess somewhere the $id_num is getting lost?

[hostfreak]

Ah, I figured it out. Needed to add:

$username = $session->username;

Thanks guys.