dynamically number dropdown ID’s linked to check boxes

@SyCoApr 08.2008 — #without seeing more of your code I'm not sure exactly what you're trying to achieve but you can generate a unique id for each set using something like a counter in a loop, or progression from a set variable eg $id=0 then $id++ when you need to increase it to keep it unique.

You can then use it to relate to any form element by appending it to the name.

eg

[code=php]<?
 $id=0;
 ?>
 <select name="list_<?=$id?>"> 
 <option...>etc
 </select>
 <input type=checkbox name="checkbox_<?=$id?>" /> 
 
 <?
 $id++;//$id now=1
 ?>
 <select name="list_<?=$id?>"> 
 <option...>etc
 </select>
 <input type=checkbox name="checkbox_<?=$id?>" /> 
 [/code]

Of course it would make sense to keep the drawing of the different elements dynamic (in a loop) so you're not limiting yourself.

So now you have a unique name for each element on the page that follow a set of rules and have a unique id associated with each one.

After the form is posted explode() on the underscore to retrieve each part of the identifier.

@dag78authorApr 08.2008 — #Many thanks

Here is my code

test page

[CODE]<?
 include 'testdoggy.php';
 error_reporting(E_ALL ^ E_NOTICE); 
 ?>
 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 <html xmlns="http://www.w3.org/1999/xhtml">
 <head>
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
 <title>Untitled Document</title>
 <html>
 <script>
 function showMe (it, box) {
 var vis = (box.checked) ? "block" : "none";
 document.getElementById(it).style.display = vis;
 }
 </script>
 </head>
 <body>
 <form action="test.php" method="post" enctype="multipart/form-data" class="style2"><table width="390" border="0">
 <tr>
 <td>dog name</td>
 <td><input type="text" size="20" maxlength="20" name="dogs" <?php if (isset($_POST['dogs'])) { ?> value="<?php echo $_POST['dogs']; ?>"
 <?php } ?>/></td>
 </tr>
 <tr>
 <td><? echo breeds() ?> </td>
 <td><div id="div1" style="display:none">
 <? echo classes() ?>
 </div></td>
 </tr>
 <tr>
 <td><input type="submit" name="submit" value="Submit" /></td>
 <td></td>
 </tr>
 <tr>
 <td width="182"></td>
 <td width="198">    </td>
 </tr>
 </table>
 </form>
 </body>
 </html>[/CODE]

and my function page is

[CODE]<?
 include 'includes/db.inc.php';
 
 function breeds(){
 $returnstr='';
 $query = "select breedsID, breedy from doggybreed order by breedy";
 $result = @mysql_query($query);
 $ii=0;
 while($breeds2=mysql_fetch_assoc($result)){
 $returnstr= $returnstr.'<label><input type="checkbox" name="breedsID_'.$ii.'" value="'.$breeds2['breedsID'].'" onclick="showMe('div1', this)" >'.$breeds2['breedy'].'</label><br />';
 $ii++;
 }
 $returnstr= $returnstr.'<input type="hidden" name="breedcount" value="'.$ii.'"/>';
 
   return $returnstr;
 }
 
 function classes(){
 $returnstr='<select name="class1">';
 $query = 'select classID, class from doggyclass order by class';
 $result = @mysql_query($query);
 
  while($areas=mysql_fetch_array($result)){
   $returnstr= $returnstr.'<option value="'.$areas['classID'].'">'.$areas['class'].'</option>';
  }
 
   $returnstr= $returnstr.'</select>';
   return $returnstr;
 }
 
 if (!isset($_POST['submit']))
 {
 
  // Store the information in the database
  $query = "insert into doggys (dogs)values ('$_POST[ndogs]')";
   mysql_query ($query) or die ('Could not add dog.');
 
 
  $query="select LAST_INSERT_ID() as id";
 
  $result=mysql_query ($query);
 
 
  if (mysql_num_rows($result) > 0)
 
  {
 
   $dogID = mysql_fetch_array($result);
 
   $dogID=$dogID['id'];
 
 
  }
  $count=count($breed);
 
  //echo 'count='.$_POST['breedcount'].'--';
 
  for($i=0;$i<$_POST['breedcount'];$i++){
   if(isset($_POST['breedsID_'.$i])){
   $query= "insert into doggybreedy(dogID,breedsID, classID) values($judgeID, '$_POST[class1]',".$_POST['breedid_'.$i].'  );';
   mysql_query ($query) or die ('Could not add judge breed.');
   }
 
  }
  }
 
 ?>[/CODE]

The idea is that each dynamically generated checkbox has a dropdown field so that when a user enters a name, selects a checkbox and then selects from the dropdown list, the options are sent to the database

Dave

dynamically number dropdown ID’s linked to check boxes

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