Question

I am using the following script

<script>
function getXMLHTTP() { 
        var xmlhttp=false;  
        try{
            xmlhttp=new XMLHttpRequest();
        }
        catch(e)    {       
            try{            
                xmlhttp= new ActiveXObject("Microsoft.XMLHTTP");
            }
            catch(e){
                try{
                xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
                }
                catch(e1){
                    xmlhttp=false;
                }
            }
        }

        return xmlhttp;
    }



function getCurrencyCode(strURL)
{       
    var req = getXMLHTTP();     
    if (req) 
    {
        //function to be called when state is changed
        req.onreadystatechange = function()
        {
            //when state is completed i.e 4
            if (req.readyState == 4) 
            {           
                // only if http status is "OK"
                if (req.status == 200)
                {                       
                    document.getElementById('cur_code').value=req.responseText;                     
                } 
                else 
                {
                    alert("There was a problem while using XMLHTTP:\n" + req.statusText);
                }
            }               
         }          
         req.open("GET", strURL, true);
         req.send(null);
    }           
}
</script>

to get the currency of some countries using AJAX, based on dropdown value.

<select id="termid" class="selectfield" onChange="getCurrencyCode('find_ccode.php?country='+this.value)">

find_ccode.php is

$country=$_REQUEST['country'];
switch($country)
{
    case "1" :
        echo "USD";
        break;
    case "2" :  
        echo "GBP";
        break;
    case "3" :  
        echo "NPR";
        break;
}

and my textbox is

<input type="text" name="cur_code" id="cur_code">

What I want is to assign the country’s currency code into a PHP variable and echo it on every change. How to do this?

Thank you

Answer 1

if you are usign jQuery why bother with custom HTTPRequest ?

<select id="termid" class="selectfield" onChange="getCurrencyCode(this.value)"><option>...</option></select>
<input type="text" name="cur_code" id="cur_code">
<script type="text/javascript">
    function getCurrencyCode(setCountry){
        $.get('find_ccode.php', { country: setCountry }, function(data) {
            $('#cur_code').val(data);
        });
    }
</script>

Later edit:
then find_ccode.php could be:

session_start();
$country=$_REQUEST['country'];
switch($country)
{
    case "1" :
        echo "USD";
        $_SESSION['currency'] = 'USD';
        break;
    case "2" :  
        echo "GBP";
        $_SESSION['currency'] = 'GBP';
        break;
    case "3" :  
        echo "NPR";
        $_SESSION['currency'] = 'NPR';
        break;
}