Currency Conversion using PHP [closed]

Answer 1

This is what I'm using:

function exchangeRate( $amount, $from, $to)
{
    switch ($from) {
        case "euro":
            $from_Currency = "EUR";
            break;
        case "dollar":
            $from_Currency = "USD";
            break;
        case "pounds":
            $from_Currency = "GBP";
            break;
    }

    switch ($to) {
        case "euro":
            $to_Currency = "EUR";
            break;
        case "dollar":
            $to_Currency = "USD";
            break;
        case "pound":
            $to_Currency = "GBP";
            break;
    }

  $amount = urlencode($amount);

  $from_Currency = urlencode($from_Currency);
  $to_Currency = urlencode($to_Currency);
  $get = file_get_contents("https://www.google.com/finance/converter?a=$amount&from=" . $from_Currency . "&to=" . $to_Currency);

  $get = explode("<span class=bld>",$get);
  $get = explode("</span>",$get[1]);
  $converted_amount = preg_replace("/[^0-9\.]/", null, $get[0]);
  return round($converted_amount, 2);
}

Answer 2

You can also check: https://free.currencyconverterapi.com

Disclaimer, I'm the author of this website.

A sample conversion URL is: http://free.currencyconverterapi.com/api/v6/convert?q=PHP_EUR,EUR_PHP&compact=ultra&apiKey=sample-api-key which will return a value in json format, e.g. {"PHP_EUR":0.016434,"EUR_PHP":60.849184}

You should note about the limitations though like maximum requests and queries (details found the website). I've implemented limits because there have been abusers of the service.

I've started this since 2014 and has been up ever since (aside from the link change and maintenance down times along the way). I personally use it for my other websites, and provided the service publicly so it can help other devs as well.

Anyway hope this helps, and here's a sample PHP code:

<?php
function convertCurrency($amount, $from, $to){
  $conv_id = "{$from}_{$to}";
  $string = file_get_contents("https://free.currencyconverterapi.com/api/v6/convert?q=$conv_id&compact=ultra&apiKey=sample-api-key");
  $json_a = json_decode($string, true);

  return $amount * round($json_a[$conv_id], 4);
}

echo(convertCurrency(5, "USD", "PHP"));
?> 

Answer 3

An example of converting EUR to USD

$url = 'http://www.webservicex.net/CurrencyConvertor.asmx/ConversionRate?FromCurrency=EUR&ToCurrency=USD';
            $xml = simpleXML_load_file($url,"SimpleXMLElement",LIBXML_NOCDATA);
            if($xml ===  FALSE)
            {
               //deal with error
            }
            else { 

                $rate = $xml;
            }

Answer 4

I like the first solution but there seems to be on BIG problem with it. I tried to implement it into a payment gateway but I kept on getting a result of 1. This perplexed me and I eventually found that it is because there is a space used by google for the thousands sparator. Thus the amount of 1 500.00 was returned as one since the rest was exploded. I have created a quick and dirty fix for it. Let me know if anyone else has experienced this problem. Here is my solution:

function currency($from_Currency,$to_Currency,$amount) {
  $amount = urlencode($amount);
  $from_Currency = urlencode($from_Currency);
  $to_Currency = urlencode($to_Currency);
  $url = "http://www.google.com/ig/calculator?hl=en&q=$amount$from_Currency=?$to_Currency";
  $ch = curl_init();
  $timeout = 0;
  curl_setopt ($ch, CURLOPT_URL, $url);
  curl_setopt ($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, $timeout);
  $rawdata = curl_exec($ch);
  curl_close($ch);
  $data = explode('"', $rawdata);
  $data = explode('.', $data['3']);
  $data[0] = str_replace(" ", "",preg_replace('/\D/', '',  $data[0]));
  if(isset($data[1])){
    $data[1] = str_replace(" ", "",preg_replace('/\D/', '', $data[1]));
    $var = $data[0].".".$data[1];        
  } else{
    $var = $data[0];
  }
  return round($var,2); }

Answer 5

https://fincharts.info/charts/exchange/?key=api_key&&from=USD&to=GBP,BWP,ZAR&amount=45854&date=2018-03-03&base=USD

seems you have to signup for an api key, I think

Answer 6

After searching a lot, found this.

// Fetching JSON
$req_url = 'https://api.exchangerate-api.com/v4/latest/USD';
$response_json = file_get_contents($req_url);

// Continuing if we got a result
if(false !== $response_json) {

    // Try/catch for json_decode operation
    try {

    // Decoding
    $response_object = json_decode($response_json);

    // YOUR APPLICATION CODE HERE, e.g.
    $base_price = 12; // Your price in USD
    $EUR_price = round(($base_price * $response_object->rates->EUR), 2);

    }
    catch(Exception $e) {
        // Handle JSON parse error...
    }
}

This is working fine. The snippet is from: https://www.exchangerate-api.com/docs/php-currency-api