Help with catagories and sub-catagories! Confused.

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September 9th, 2002, 07:04 PM

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Help with catagories and sub-catagories! Confused.

Hello everyone. I know this is my first post but I have been at this
for awhile now and cannot seem to get it to work properly. This
is a 2 part question the first part is of the most important however.

Any help would be greatly appreciated it.

Part 1:

I have a table setup with catagories and subcats like so:

id main_id cat_name
1 0 Main
2 1 Catagory 1
3 1 Catagory 2
4 1 Catagory 3
5 2 Cat 1 Sub-Cat 1
6 2 Cat 1 Sub Cat-2
7 5 Cat 1 Sub-Cat 1 Sub-Cat

and so on up to three total sub-cats, could be as little as 1
sub-cat.

Now what I am trying to do in this part is if there are no other
sub-cats I would like to go to query a different table and give
its output. This is for a classified ads system. If we get to the last
sub-cat I will query the ads table and show the ads list. Here is
what I have for displaying the sub-cats for each catagory:

php Code:

Original - php Code

 
<?php
                                        
// we need to print the proper catagories now
$alternate = "1";
$query = "select * from $tblcats where main_id='$catid';";
$results = db_query($db, $dbhost, $dbuser, $dbpass, $query);
while($row = mysql_fetch_array($results)){
// lets print the sub category for this one
    $mainid = $row['id'];
    if ($alternate == "1") { 
        echo "<tr>"; 
    }
    if($numdays){
        echo "<td valign="top"><img src="$catimg/square.gif" border="0" align="absmiddle">&nbsp;&nbsp;<a href="viewsubcats.php?catid=$row[id]">$row[cat_name]</a><br>";
    }else{
        echo "<td valign="top"><img src="$catimg/square.gif" border="0" align="absmiddle">&nbsp;&nbsp;<a href="viewsubcats.php?catid=$row[id]">$row[cat_name]</a><br>";
    }
    if ($alternate == "1") { 
        echo "</td>n"; 
        $alternate = "2"; 
    }else { 
        echo "</td></tr>n"; 
        $alternate = "1"; 
    } 
        $count++;
}
?>

If anyone can see how I can make it where it will stop looking for
catagories and go onto a different query I would greatly appreciate it.

Part 2:

What I am trying to do here is no matter how deep the sub-cats
go I can get them all without haveing to do a different loop for
each. This way there can be unlimited sub-cats like so:

Cat 1
-- Sub Cat 1
---- Sub-Sub Cat 1
------ Sub-Sub-Sub Cat 1

and so on and so on. This would go into a select drop down box. Here is the code I am currently using:

php Code:

Original - php Code

 
            <select name="catid" size="1">
            <option value="0" SELECTED>-- Select Category --</option>
            <?php
    $alternate = "1";
    $catquery = "select * from $tblcats where main_id='1';";
    $catresults = db_query($db, $dbhost, $dbuser, $dbpass, $catquery);
    while($catrow = mysql_fetch_array($catresults)){
    // lets print the sub category for this one
        $catmainid = $catrow['id'];
        echo "<option value="$catrow[id]"><b>$catrow[cat_name]</b></option>n";
            $catsubquery = "select * from $tblcats where main_id='$catmainid' ORDER by cat_name ASC;";
            $catsubresult = db_query($db, $dbhost, $dbuser, $dbpass, $catsubquery);
            while($catsubinfo = mysql_fetch_array($catsubresult)) {
                $catsubid = $catsubinfo['id'];
                echo "<option value="$catsubinfo[id]">&nbsp;&nbsp;&nbsp;>>$catsubinfo[cat_name]</option>n";
                if($catsubid) { 
                    $catsub2query = "select * from $tblcats where main_id='$catsubid' ORDER by cat_name ASC;";
                    $catsub2result = db_query($db, $dbhost, $dbuser, $dbpass, $catsub2query);
                    while($catsub2info = mysql_fetch_array($catsub2result)) {
                        $otcat = $catsub2info['id'];
                        echo "<option value="$catsub2info[id]">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;>>$catsub2info[cat_name]</option>n";
                        if($otcat) {
                            $catsub3query = "select * from $tblcats where main_id='$otcat' ORDER by cat_name ASC;";
                            $catsub3result = db_query($db, $dbhost, $dbuser, $dbpass, $catsub3query);
                            while($catsub3info = mysql_fetch_array($catsub3result)) {
                                echo "<option value="$catsub3info[id]">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;>>$catsub3info[cat_name]</option>n";
                            }
                        }
                    }
                }
            }
        }
            ?></select>

Again any help would be greatly appreciated. Thanks in advance.

Regards,
Ray

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