Question

how can i change/assign a value to php variable depending on a javascript variable?
here is my code.

<select id="reOutcome" name="reOutcome" onchange="OnChange(this.form.reOutcome);">
<option value="1">Value 1</option>
<option value="2">Value 2</option>
<option value="3">Value 3</option>
</select>

<script type="text/javascript">

function OnChange(dropdown)
{
    var myindex  = dropdown.selectedIndex
    var SelValue = dropdown.options[myindex].value
    if(SelValue==2){        
     <?php
    $sCOMPFields .= "|"."SreComments";
    $sCOMPFields .= "|"."rePrID";   
     ?>
    }
    return true;
}
</script>

The onchange function is working fine. I just don’t know how to change the php variable. I searched online a lot. All im getting is how to assign php variable to javascript. That is not what im looking for.
Thanks for your help.

Answer 1

The execution you want won`t occur, because the flow of the php scope and the javascript scope occurs on different moments. It is something like this:

So, you can`t execute php while the javascript is being executed on the computer of the user through the browser, but you can execute php on your server to generate the javascript you need to be executed on the user computer.

Actually, your question seems to be closer to a "what is the best way to do (something)"