Multiple WHILE loops help

Posted on 16th Feb 2014 07:03 pm by admin

Hi there. I'm writing an application that is pulling and displaying results for real estate listings and associated photographs. The output is using two MySQL querys and WHILE statements. The outer WHILE loop pulls listing information for all listings within a given category. This loop is working just fine.

The problem lies within the second, inner WHILE loop. The second loop pulls photograph information for each of the listings provided in the first loop. What's happening is; after each subsequent iteration of the first loop, the second loop is displaying all results of all previous second loops plus the current run. (Additionally, the first result of only the first run is displaying twice) Hopefully I can demonstrate better below.

Listing 1 information
(assuming Listing 1 has 2 photos)
Listing 1 photo 1, Listing 1 photo 1, Listing 1 photo 2 //for some reason the first photo of only the first listing is displayed twice

Listing 2 information
(assuming Listing 2 has 2 photos)
Listing 1 photo 1, Listing 1 photo 2, Listing 2 photo 1, Listing 2 photo 2

Listing 3 information
(assuming Listing 3 has 1 photo)
Listing 1 photo 1, Listing 1 photo 2, Listing 2 photo 1, Listing 2 photo 2, Listing 3 photo 1

Here is the code I'm using:

Code: $catlist = @mysql_query("SELECT * FROM category GROUP BY CatName ORDER BY CatName");
if (!$catlist) {
echo("<p>Error getting results: " . mysql_error . "</p>");
}

// display category listing
echo("<p align="center">| n");
while($pagerow = mysql_fetch_array($catlist)) {
$CatName=$pagerow["CatName"];
$CatID=$pagerow["CatID"];

$count = @mysql_query("SELECT * FROM CategoryLookup WHERE CatID='$CatID'");
if(!$count) {
echo ("<p>Could not count rows: " . mysql_error . "</p>");
}
$number = mysql_num_rows($count);

echo(" <a href='$PHP_SELF?cat=" . $CatID . "'>" . $CatName ." (" . $number . ")</a> |");
}
echo("</p>n");

if (isset($_GET['cat'])) {
$cat = $_GET['cat'];
$result = @mysql_query("SELECT * FROM CategoryLookup, Listing WHERE CategoryLookup.CatID='$cat' AND Listing.ID=CategoryLookup.ID");
if (!$result)
{
echo("<P>Error getting results: " . mysql_error . "</P>");
}

//Display contacts in paragraphs
//with delete and modify link beside each
while ( $row = mysql_fetch_array($result) )
{
$ID = $row["ID"];
$MLSNum = $row["MLSNum"];
$Price = $row["Price"];
$Status = $row["Status"];
//Removed for brevity
$Direction = $row['Direction'];

//Build output and remove empty lines
$output = '<p>';
if($MLSNum != '') {
$output .= '<strong style="font-size:120%;">' . $MLSNum . '</strong><br />';
}
if($Price != '') {
$output .= '$' . $Price . '<br />';
}
if($Status != '') {
$output .= $Status . '<br />';
}
//Again, removed for brevity
$output .= "<p>Directions:<br />" . $Direction . "</p>n";



//Start output display
echo("<table width='800' bgcolor='#DEDEDE'><tr><td>n");
echo("<table><tr><td valign="top">n");
echo $output;
echo("</td></tr>n");

//Start photograph display
echo("<tr><td colspan="2">n");

//###############################
//#####PROBLEM AREA STARTS HERE#######
//###############################
$photoresult = @mysql_query("SELECT Photo, Main FROM photos WHERE photos.MLSNum='$MLSNum' AND photos.ID='$ID'");
if (!$photoresult)
{
echo("<P>Error getting results: " . mysql_error . "</P>");
}
while ( $photorow = mysql_fetch_array($photoresult) )
{
$Photo = $photorow["Photo"];
$Main = $photorow["Main"];
$Timg='../pics/' . $Photo . '';

$photooutput .= "&nbsp;<a href="" . $Timg . ""><img src="RESIZE_IMAGE.PHP?image=" . $Timg . "" border="0" ";

if($Main=='Yes') {
$photooutput .= "style="border:2px solid #f00;" ";
}
$photooutput .= " /></a>n";

echo $photooutput;
}

//#########################
//########end phoblem area######
//##########################

echo("</td></tr></table>n");

//Finish output display
echo("</td>" .
"<td align='center'><p><a href='$current_url?delcontact=$ID'>Delete this listing?</a></p>n" .
"<p><a href='$current_url?modcontact=$ID'>Modify this listing?</a></p>n" .
"<p><a href='photos.php?ID=$ID&MLSNum=$MLSNum'>Add / Edit Photos</a></p>n" .
"</td></tr></table>
n");

echo $ID . " | " . $MLSNum;

}

} else {
echo("<p>Select a category above</p>n");
}


I must be missing something small but my lone set of eyeballs are going crazy.

Please help

Your Answer:

Login to answer

Other forums

DB2 for z/OS, LUW, iSeries
Hello, In this forum a lot of threads related to other members of the DB2 family than DB2 for z/OS

help with multi-update
Now sure how to ask this really....
10g database if that matters.

I have a customer

Problem in back link
I have page where i have given javascript back link but when i click on it browser give a message

Dump with added_funcion cl_salv_table
Hi there, I'm having some troubles adding a self defined function to an ALV in fullscreen. The thing

Can anyone give me some link on .htaccess tutorial
i wish to have friendly url using .htaccess, but no idea yet about this

Hope that anyone cou

need good snippet manager
Hi. as i am coding and learning more, it is becoming difficult to manage code snippets. how you mana

Combining Two Queries
I have two scripts that each work fine by themselves. One is a search script with a variable that de

timed header image rotation
I have a joomla site and I was trying to setup a rotating image based on timing NOT just refreshing

batch file not building to webapps folder
Hello. I just started running Vista :P and can't seem to get my projects deployed. I found out how

Output Full URL of Current Page
Let's say I am currently viewing a dynamic page:

http://www.mydomain.com/directory/index.php