Javascript create drop down add PHP script

Question

case '1':
document.getElementById(q15).options.length = 0;
for (i = 0; i < australia.length; i++) {
     createOption(document.getElementById(q15), australia[i], australia[i]);
     }
break;

The above code calls the array information:

function createOption(ddl, text, value) {
        var opt = document.createElement('option');
        opt.value = value;
        opt.text = text;
        ddl.options.add(opt);
    }

The above code creates a drop down as below:

<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>

etc

What I need is to also get it to add some PHP script as well, is this possible? It would look like this (NOTE: ==1 the '1' needs to be a variable, could it be the '[i] from the top Javascript code?:

<option value="1" <?php if ($results['q14']==1) echo "selected";?>>1</option>
<option value="2" <?php if ($results['q14']==2) echo "selected";?>>2</option>
<option value="3" <?php if ($results['q14']==3) echo "selected";?>>3</option>

Answer 1

Because in a synchronous connection JavaScript is interpreted after PHP has already been parsed, You either can add php code to the JavaScript itself, or create an asynchronous AJAX request to a php script in order to check which option should be selected. For the first choice:

function createOption(ddl, text, value, selected) {
    var opt = document.createElement('option');
    opt.value = value;
    opt.text = text;
    opt.selected = selected;
    ddl.options.add(opt);
}

and in the call

createOption(ddl, "some option", "someopt", <?=($results['q14']==1)?'true':'false'?>);

Note that this JavaScript has to be parsed by PHP, so either include it in the *.php file or add *.js to the webservers handler mappings.