category and sub category drop down form problem

ricky spires · July 11, 2011

Hello,

I have been searching and trying all sorts of ways to get my sub categories drop down to show the correct info after selecting a category from the main drop down but im getting stuck.

It's pulling the categories and sub categories from the mysql database fine but no matter which main category i pick it keeps showing the same result in the sub category.

My brother said i need to use some sort of onchange do this so the sub category list refreshs but everything i have tried doesn't work..

PLEASE could some one help.

MANY MANY THANKS

This is the category form

  <select name="job_cats" style="width:165px">
    <?PHP

	$query1 = "SELECT * FROM job_cats";
	$result1 = mysql_query($query1) or die ("query 1 failed");
	$count1 = mysql_num_rows($result1);

	for ($i = 0; $i < $count1; $i++) {
	$row1 = mysql_fetch_array($result1);
	$job_cats_title1 = $row1['title'];
	$job_cats_id1 = $row1['id'];


echo '<option value="'.$job_cats_id1.'">'.$job_cats_title1.'</option>';

	echo $job_cats_id1;
}
    ?>
    </select>

this would echo this in the main category list:

cat1

cat2

cat3

cat4

this is the sub category form

  <select name="job_sub_cats" style="width:165px">
  
    <?PHP 
	$query1 = "SELECT * FROM job_sub_cats WHERE job_cats_id = $job_cats_id1";

	$result1 = mysql_query($query1) or die ("query 1 failed");
	$count1 = mysql_num_rows($result1);


	for ($i = 0; $i < $count1; $i++) {
	$row1 = mysql_fetch_array($result1);

	$sub_cats_id1 = $row1['id'];
	$sub_cats_title1 = $row1['subTitle'];
	$cats_id1 = $row1['job_cats_id'];

	echo '<option value="'.$sub_cats_id1.'">'.$cats_id1.'</option>';

	}
    ?>
    </select>

this should echo this:

1

2

3

4

but it keeps echoing just the number 4.

THANKS

PLEASE HELP

ricky

teynon · July 11, 2011

Please post all your code. I need to at least see how $job_cats_id1 is being set.

ricky spires · July 11, 2011

Thanks for your quick reply..

<?PHP
include("dbconnect.php");
$error = '';


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


		if ($_POST['title']==''){
			$star1 = '<span class="redStar">*</span>';

		}

			if ($_POST['cat']==''){
			$star2 = '<span class="redStar">*</span>';

		}
		if ($_POST['subCat']==''){
			$star3 = '<span class="redStar">*</span>';

		}

		if ($_POST['description']==''){
			$star3 = '<span class="redStar">*</span>';

		}



  		   $format = '0'; 
       
	   if ($_POST['title']=='' || $_POST['cat']=='Select a Job Category' ||  $_POST['subCat']=='Select a Job sub category' || $_POST['description']==''){

			$error = '<br><br><span class="title_red_13_bold">Sorry, but all areas marked with * must be completed</span><br><br>';
			$format='1';
	   
	    }

	     

		      if($format=='0'){


			  $title = addslashes($_POST['title']);
			  $description = addslashes($_POST['description']);
			  $job_cats_id = addslashes($_POST['job_cats']);
			  $sub_cats_id = addslashes($_POST['job_sub_cats']);


			  //RADIO BUTTON
			  $salary = addslashes($_POST['salary']);
			  
			  //CHECK BOXES
			  $option1 = addslashes($_POST['option1']);
			  $option2 = addslashes($_POST['option2']);
			  
			  $tick1 = addslashes($_POST['tick1']);
			  $tick2 = addslashes($_POST['tick2']);
			  $tick3 = addslashes($_POST['tick3']);
			  $tick4 = addslashes($_POST['tick4']);
			  
			  // CHECK IF BOXES ARE TICKED
			  $option1 = "";
			  $option2 = "";


			    if ($tick1){
						$option1 .= $tick1.',';
					 }
				if ($tick2){
						$option1 .= $tick2.',';
					 }
				if ($tick3){
						$option2 .= $tick3.',';
					 }
				if ($tick4){
						$option2 .= $tick4.',';
					 }		 

			// INPUT DATE & TIME
				  $date = date('Y-m-d');


			 //GOT TO HERE.....

			$sql = "INSERT INTO jobs (title, datePosted, cat_id, subCat_id, option1, option2, salary, description) 

			VALUES ('$title', '$date', '$job_cats_id', '$sub_cats_id', '$option1', '$option2', '$salary', '$description')";

			$query = mysql_query($sql) or die ("124 - insert into jobs" .mysql_error());

			$job_id = mysql_insert_id();
   


			if($query){

					header("Location:add_job.php");

			}else{ 

					if($format=='1'){
				      
					  $title = addslashes($_POST['title']);
					  $description = addslashes($_POST['description']);
					  $cat = addslashes($_POST['cat']);
					  $subCat = addslashes($_POST['subCat']);
										  
			 		  $job_cats_id = addslashes($_POST['job_cats']);
					  $sub_cats_id = addslashes($_POST['job_sub_cats']);

        
					  
					  
					  //CHECK BOXES
					  $option1 = addslashes($_POST['option1']);
					  $option2 = addslashes($_POST['option2']);
					  
					  $tick1 = addslashes($_POST['tick1']);
					  $tick2 = addslashes($_POST['tick2']);
					  $tick3 = addslashes($_POST['tick3']);
					  $tick4 = addslashes($_POST['tick4']);
					  
					  // CHECK IF BOXES ARE TICKED
					  $option1 = "";
					  $option2 = "";

						if ($tick1){
						$option1 .= $tick1.',';
						}
						if ($tick2){
						$option1 .= $tick2.',';
						}
						if ($tick3){
						$option2 .= $tick3.',';
						} 
				        if ($tick4){
						$option2 .= $tick4.',';
					    }	

						 $date = date('Y-m-d');


					    $error = '<br><br><span class="title_red_13_bold">Sorry, but all areas marked with * must be completed</span><br><br>';

					}// end $format

			} // end if($query - else
	}// end $format		
} // isset

?>

<!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=ISO-8859-1"/>
<meta name="Keywords" content="" />
<title>add a job</title>
<link href="style.css" rel="stylesheet" type="text/css" />


           
</head>
<body>
<?PHP if ($error) { echo $error; }?>
       
<h1>ADD A JOB</h1>
<BR />
<form action="<?PHP echo $_SERVER['PHP_SELF']; ?>" method="post" name="form1">


<table width="691" border="0" align="center" cellpadding="5">
  <tr>
    <td width="106" valign="top" class="verdana_12_bold"><div align="left">Title:</div></td>
    <td colspan="2" align="center" valign="top"><div align="left">
      <input type="text" name="title" value=""/>    
    </div></td>
  </tr>
  <tr>
    <td valign="top"><div align="left"><span class="verdana_12_bold">Description:</span></div></td>
    <td colspan="2" align="center" valign="top"><div align="left">
      <textarea name="description" value="<?PHP echo htmlentities($description);
   ?>" cols="45" rows="5"></textarea>
    </div></td>
  </tr>
  
  <tr>
    <td width="106" valign="top" class="verdana_12_bold"><div align="left">Categories:</div></td>
    <td colspan="2" align="center" valign="top"><div align="left">
   
   
    <select name="job_cats" style="width:165px">
    <?PHP
    if ($format=='1' && $_POST['job_cats_title']) {
	echo '<option value="'.$_POST['job_cats_title'].'">'.$_POST['job_cats_title'].'</option>';
	'<option value="Select a Job Category">------</option>';
    } else {
	echo '<option value="Select a Job Category">Select a Job Category</option>';
    }
    ?>
    <?PHP

	$query1 = "SELECT * FROM job_cats";
	$result1 = mysql_query($query1) or die ("query 1 failed");
	$count1 = mysql_num_rows($result1);

	for ($i = 0; $i < $count1; $i++) {
	$row1 = mysql_fetch_array($result1);
	$job_cats_title1 = $row1['title'];
	$job_cats_id1 = $row1['id'];


echo '<option value="'.$job_cats_id1.'">'.$job_cats_title1.'</option>';

	echo $job_cats_id1;
}
    ?>
    </select>
      
    
      
      <br/>
      <br/>
      
    <select name="job_sub_cats" style="width:165px">
    <?PHP
    if ($format=='1' && $_POST['job_sub_cats']) {
	echo '<option value="'.$_POST['job_sub_cats'].'">'.$_POST['job_sub_cats'].'</option>';
	'<option value="Select a Job Sub category">------</option>';
    } else {
	echo '<option value="Select a Job sub category">Select a Job sub category</option>';
    }
    ?>
    <?PHP 
	$query1 = "SELECT * FROM job_sub_cats WHERE job_cats_id = $job_cats_id1";

	$result1 = mysql_query($query1) or die ("query 1 failed");
	$count1 = mysql_num_rows($result1);


	for ($i = 0; $i < $count1; $i++) {
	$row1 = mysql_fetch_array($result1);

	$sub_cats_id1 = $row1['id'];
	$sub_cats_title1 = $row1['subTitle'];
	$cats_id1 = $row1['job_cats_id'];

	echo '<option value="'.$sub_cats_id1.'">'.$cats_id1.'</option>';

	}
    ?>
    </select>
    
  
    </div></td>
  </tr>
  <tr valign="top">
    <td><div align="left"><span class="verdana_12_bold">Options:</span></div></td>
    <td colspan="2" align="left" class="title_red_13"><div align="left">Option1:</div></td>
  </tr>
  <tr>
    <td rowspan="5" valign="top"> </td>
    <td align="center" valign="top"><div align="center">
        <input type="checkbox" name="tick1" value="1" <?PHP //if ($format=='1' && $_POST['tick1']) { echo 'checked="checked"'; }?> />
      </div></td>
    <td width="474">Tick 1</td>
  </tr>
  <tr>
    <td align="center" valign="top"><div align="center">
        <input type="checkbox" name="tick2" value="2" <?PHP //if ($format=='1' && $_POST['tick2']) { echo 'checked="checked"'; }?>/>
      </div></td>
    <td>Tick 2</td>
  </tr>
  <tr valign="top">
    <td colspan="2" align="left" class="title_red_13"><div align="left">Option2:</div></td>
  </tr>
  <tr>
    <td align="center" valign="top"><div align="center">
        <input type="checkbox" name="tick3" value="3" <?PHP //if ($format=='1' && $_POST['tick3']) { echo 'checked="checked"'; }?>/>
      </div></td>
    <td>Tick 3</td>
  </tr>
  <tr>
    <td align="center" valign="top"><div align="center">
      <input type="checkbox" name="tick4" value="4" <?PHP //if ($format=='1' && $_POST['tick4']) { echo 'checked="checked"'; }?>/>
    </div></td>
    <td>Tick 4</td>
  </tr>
  
  <tr>
    <td valign="top"><div align="left"><span class="verdana_12_bold">Salary:</span></div></td>
    <td align="center" valign="top"><div align="left">
        <input type="radio" name="salary" value="paid" />
        Paid</div>      </td>
    <td align="center" valign="top"><div align="left">
      <input type="radio" name="salary" value="unpaid" />
    Unpaid</div></td>
  </tr>
  <tr valign="top">
    <td colspan="3"><hr align="left"/></td>
  </tr>
  
  
  
  
  
  
  
  
   <tr>
    <td valign="top"><div align="left"><span class="verdana_12_bold">Country:</span></div></td>
    <td align="center" valign="top"><div align="left">
    
      <select name="job_cats" style="width:165px" nChange="getjob_sub_cats('subCats.php?job_cats='+this.value)">
    <?PHP
    if ($format=='1' && $_POST['job_cats_title']) {
	echo '<option value="'.$_POST['job_cats_title'].'">'.$_POST['job_cats_title'].'</option>';
	'<option value="Select a Job Category">------</option>';
    } else {
	echo '<option value="Select a Job Category">Select a Job Category</option>';
    }
    ?>
    <?PHP

	$query1 = "SELECT * FROM job_cats";
	$result1 = mysql_query($query1) or die ("query 1 failed");
	$count1 = mysql_num_rows($result1);

	for ($i = 0; $i < $count1; $i++) {
	$row1 = mysql_fetch_array($result1);
	$job_cats_title1 = $row1['title'];
	$job_cats_id1 = $row1['id'];


echo '<option value="'.$job_cats_id1.'">'.$job_cats_title1.'</option>';

	echo $job_cats_id1;
}
    ?>
    </select>
     </div>      </td>
     
     
     
     
     
    <td align="center" valign="top"><div id="citydiv" align="left">
<select name="job_sub_cats" style="width:165px">
    <?PHP
    if ($format=='1' && $_POST['job_sub_cats']) {
	echo '<option value="'.$_POST['job_sub_cats'].'">'.$_POST['job_sub_cats'].'</option>';
	'<option value="Select a Job Sub category">------</option>';
    } else {
	echo '<option value="Select a Job sub category">Select a Job sub category</option>';
    }
    ?>
    <?PHP 

$job_cats=intval($_GET['job_cats']);

	$query1 = "SELECT * FROM job_sub_cats WHERE job_cats_id = $job_cats_id1";

	$result1 = mysql_query($query1) or die ("query 1 failed");
	$count1 = mysql_num_rows($result1);


	for ($i = 0; $i < $count1; $i++) {
	$row1 = mysql_fetch_array($result1);

	$sub_cats_id1 = $row1['id'];
	$sub_cats_title1 = $row1['subTitle'];
	$cats_id1 = $row1['job_cats_id'];

	echo '<option value="'.$sub_cats_id1.'">'.$cats_id1.'</option>';

	}
    ?>
    </select>
</div></td>
  </tr>
  <tr valign="top">
    <td colspan="3"><hr align="left"/></td>
  </tr>
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  <tr>
    <td colspan="3">
      <div align="left">
        <input type="submit" name="submit"  value="submit" />
      </div></td>
  </tr>
</table>
</form>
</body>
</html>

and this is whats in the database

CREATE TABLE `jobs` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `title` varchar(255) NOT NULL,
  `datePosted` date NOT NULL,
  `cat_id` int(11) NOT NULL,
  `subCat_id` int(11) NOT NULL,
  `option1` varchar(255) NOT NULL,
  `option2` varchar(255) NOT NULL,
  `salary` varchar(255) NOT NULL,
  `description` text NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=MyISAM  DEFAULT CHARSET=latin1 AUTO_INCREMENT=13 ;






CREATE TABLE `job_cats` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `title` varchar(255) NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=MyISAM  DEFAULT CHARSET=latin1 AUTO_INCREMENT=5 ;






CREATE TABLE `job_sub_cats` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `job_cats_id` int(11) NOT NULL,
  `job_cats_title` varchar(255) NOT NULL,
  `subTitle` varchar(255) NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=MyISAM  DEFAULT CHARSET=latin1 AUTO_INCREMENT=172 ;

teynon · July 11, 2011

Ok, based on your code, you are not updating the sub categories. You are simply using the last job category id that was processed by mysql / php. You need to determine the selected one. Either using ajax or interpreting the page POST variables and assigning the ID based on what the user selected.

ricky spires · July 11, 2011

I tried loads of ajax but i couldn't get any of it to work

would you mind pointing me in the right direction.

thanks

rick

teynon · July 11, 2011

I'm actually working on a website for a customer that uses this same concept. I'll post the code, hopefully you can swim your way through it.

JAVASCRIPT / AJX

function getStoreLocations() {

var xmlHttp;

try {

	// Firefox, Opera 8.0+, Safari

	xmlHttp=new XMLHttpRequest();

}

catch (e) {

	// Internet Explorer  

	try {

		xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");

	}

	catch (e) {

		try {

			xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");

		}

		catch (e) {

			alert("Your browser does not support AJAX!");

			return false;

		}

	}

}



xmlHttp.onreadystatechange=function() {

	if(xmlHttp.readyState==4) {

		document.getElementById('store').innerHTML=xmlHttp.responseText;

	}

	else if (xmlHttp.readyState==2) {

		document.getElementById('store').innerHTML='Loading...';

	}

}

// Store ID to get.
var storeID = document.getElementById('mainStore').value;
xmlHttp.open("GET","include/getStoreLocations.php?store="+storeID,true);
closeCommand=0;
closeAjax();
xmlHttp.send(null);

}

getStoreLocations.php

<?php
$ajax=1;
$login_required=true;
$admin_required=true;
require_once "template.php";
if ((!isset($_GET['store']))||(!ctype_digit($_GET['store']))) {
	die();
}

echo "<select name=\"store_location\" class=\"storeLocations\" id=\"storeLocations\" multiple size=12><option value=\"0\" selected>All Locations</option>";
$sql="SELECT t2.ID, t2.ADDR1, t2.CITY, t2.STATE, t2.ZIP FROM store_locations as t1, address as t2 WHERE t1.SID = '{$_GET['store']}' AND t1.ID = t2.PID AND t2.TID = 3";
if ($query=@mysql_query($sql)) {
	while ($req=mysql_fetch_array($query)) {
		echo "<option value=\"{$req[0]}\">{$req[1]}, {$req[2]} {$req[3]}, {$req[4]}</option>";
	}
}
?>
</select><br /><a href="#" onClick="openAjax('addStoreLocation_ajax.php?id=<?php print $_GET['store'];?>', 'getStoreLocations();');">Add Store Location</a>
<?php
@mysql_close($id_link);
?>

Building the main category list

<?php
$ajax=1;
$login_required=true;
$admin_required=true;
require_once $_SERVER['DOCUMENT_ROOT']."cpbogo/include/template.php";
securePost();
$error=0;
$response="";

?>
<select name="store" onChange="getStoreLocations();" onKeyUp="getStoreLocations();" id="mainStore" class="storeSelectBox">
<option value="0">Select Store</option>
<?php echo buildOptions(getStores()); ?>
</select><br />
<a href="#" onClick="openAjax('addStore_ajax.php', 'refreshStoreList();clearStoreLocations();');">Add Store</a>
<?php
@mysql_close($id_link);
?>

in template.php I have



function getStores() {
	// Get all stores and ids
	$array=array();
	$sql="SELECT `BUS_NAME`, `ID` FROM store ORDER BY `BUS_NAME`";
	if ($query=@mysql_query($sql)) {
		if (mysql_num_rows($query) > 0) {
			while ($req=@mysql_fetch_array($query)) {
				$array[$req['ID']]=$req['BUS_NAME'];
			}
		}
	}
	return $array;
}
function buildOptions($array) {
	$output="";
	foreach ($array as $key=>$value) {
		$output.="<option value='{$key}'>{$value}</option>";
	}
	return $output;
}

And here is what the actual HTML looks like

<div id="storeMain" class="storeLocations">
<select name="store" onchange="getStoreLocations();" onkeyup="getStoreLocations();" id="mainStore" class="storeSelectBox">
<option value="0">Select Store</option>
<option value="1">Kmart</option>
<option value="2">Piggly Wiggly</option>
</select><br>
<a href="#" onclick="openAjax('addStore_ajax.php', 'refreshStoreList();clearStoreLocations();');">Add Store</a>
</div>
<div id="store" class="storeLocations"></div>

ricky spires · July 11, 2011

WOW...

Thankyou. i'll look over it and give it a go

cheers

rick

prash · March 17, 2012

I need a help.

I am making a upload page where i want to use three drop down as -

dropbox 1 -> dropbox 2 -> dropbox 3

I want to call the values from sql to all three dropdowns and also want to upload content based on choosen options. For example i want to upload a game of nokia mobile phone that’s model no is c200 then -

the device list (computer, mobile etc) list should come in dropdown 1 and device company name(Nokia, Samsung etc) should come in dropdown 2 and device model list(c200, c101 etc) should come in dropdown 3

then choose the file and hit upload.

please provide me this. your help will be heartfull for me as i am not able to make this...[] PLEASE HELP ME OUT

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category and sub category drop down form problem

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