Currency converter for php

1. Create html element for calling ajax function
2. create currency.js and add code
1. function currency(amount){
   
    //Get all the values
   
    var from = "USD";
    var to = $('#convert').val();
   
    //Make data string
    var dataString = "amount=" + amount + "&from=" + from + "&to=" + to;
   
    $.ajax({
    type: "POST",
    url: "ajax_converter.php",
    data: dataString,
   
    success: function(data){
    //Show results div
    $('#results').hide();
   
    //Put received response into result div
    $('#results').html(data);
       if(document.getElementById('currency_converter_result'))
       {
               $('#results').html($('#currency_converter_result').find('span').html());
               $('#results').show();
       }
    }
   
    });
    };
3. create ajax_converter.php for calling api
1. $amount = $_POST['amount'];
   $from =$_POST['from'];
   $to = $_POST['to'];
   //make string to be put in API
   $string = $amount.$from."=?".$to;
   
   //Call Google API
   //$google_url = "http://www.google.com/ig/calculator?hl=en&q=".$string;
   $google_url = "http://www.google.com/finance/converter?a=".$amount."&from=USD&to=".$to."";
   
   
   //Get and Store API results into a variable
   //$result = file_get_contents($google_url);
   $ch = curl_init();
   curl_setopt($ch, CURLOPT_URL, $google_url);
   curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
   curl_setopt($ch,  CURLOPT_USERAGENT , "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1)");
   curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, 0);
   $result = curl_exec ($ch);
   curl_close ($ch);
          
   var_dump($result);

enjoy :D