Jump to content

php array elements and javascript?


Recommended Posts



I've got a page with a number of dependent dropdown menus.  i.e. using car manufacturer/models as an example...If the user selects 'Ford' as a manufacturer javascript reloads the page with ?manufacturer=Ford in the url and php restricts the model dropdown to models made by Ford.  It works the other way too, if they select a model first the list of manufacturers is restricted.


Things just got more complicated and  users may select up to 3 models from the same manufacturer.  If I turn the form element 'model' into an array how do I get javascript to work with it?


I just need what to to with the call to the reload() function and the javascript. I can deal with php arrays.


Many thanks



Bits of my code for a single model...



<select name="make" onchange="reload(this.form,'select.php')" >
    <option value="0" selected></option>
    <option value="1">Ford</option>
    <option value="2">VW</option>
    <option value="4">Opal</option>
<select name="model" onchange="reload(this.form,'select.php')" >
    <option value="0" selected></option>
    <option value="4">fiesta</option>
    <option value="23">fabia</option>
    <option value="24">td9</option>



function ddmodel(){
if (isset($_REQUEST['make']) and $_REQUEST['make']>0) {
	$mainquery="SELECT DISTINCT id,model FROM model where make=".$_REQUEST['make']
else {$mainquery="SELECT id,model from model"; }

$string= "<td><select name=\"model[".$n."]\" onchange=\"reload(this.form,'".$_SERVER['PHP_SELF']."')\" >";
$string.= "<option value=\"0\" selected></option>\n";
$ddsql_result = mysql_query($mainquery);
	while($ddrow = mysql_fetch_assoc($ddsql_result)){
		if ($_REQUEST['model']==$ddrow['id']) {
			$string.= "<option value=\"".$ddrow['id']."\" selected>".$ddrow['model']."</option>\n";
	else {$string.= "<option value=\"".$ddrow['id']."\">".$ddrow['model']."</option>\n";}
$string.= "</select></td>\n";
return $string;

function ddmake(){
if (isset($_REQUEST['model']) and $_REQUEST['model']>0) {
	$mainquery="SELECT make.make,make.id from make left join model on (make.id=model.make) where model.id=".$_REQUEST['model'];
else {$mainquery="SELECT make,id from make order by make"; }

$string= "<td><select name=\"make\" onchange=\"reload(this.form,'".$_SERVER['PHP_SELF']."')\" >";
$string= "<option value=\"\"selected></option>\n";
$ddsql_result = mysql_query("$mainquery");
if(mysql_num_rows($ddsql_result)){while($ddrow = mysql_fetch_assoc($ddsql_result)){
	if ($_REQUEST['make']==$ddrow['id']) {
		$string.= "<option value=\"".$ddrow['id']."\" selected>".$ddrow['make']."</option>\n";
	else {
		$string.= "<option value=\"".$ddrow['id']."\">".$ddrow['make']."</option>\n";
$string.= "</select></td>\n";
return $string;



function reload(form,selfid){
var str='?';
if (form.make && form.make.options[form.make.options.selectedIndex].value>0) {
	 str +='&make=' + form.make.options[form.make.options.selectedIndex].value;
if (form.model && form.model.options[form.model.options.selectedIndex].value>0) {
	str +='&model=' + form.model.options[form.model.options.selectedIndex].value;
self.location=selfid + str;


Link to comment
Share on other sites

This thread is more than a year old. Are you sure you have something important to add to it?

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.