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phpjsoncurrency

Conversion. USD to custom currency

So I've been trying to convert USD to FMC, FMC to USD, GBP to FMC, FMC to GBP, EUR to FMC, FMC to EUR

I just can't seem to figure out how to convert it. I realize it's probably more math related, but could someone point me in the correct direction. I don't want ti done for me. Just need another pair of eyes.

$url = "http://femicoin.cf/rate.json";
$json = file_get_contents($url);
$data = json_decode($json, TRUE);
$FMC = $data[1]["rate"];

http://femicoin.cf/rate.json holds all the currency values.

I'm making a cryptocurrency for a project me and my buds thought of. Just to joke around with.

Solution

  • Json returned by the URL is
    [ {"code":"FMC","name":"Femicoin","rate":0.023}, {"code":"USD","name":"US Dollar","rate":1}, {"code":"GBP","name":"British Pound","rate":1.25}, {"code":"EUR","name":"Euro","rate":0.94} ]

    1. Decode Json into an array. $jsonArr = json_decode($json, true);

    2. If sequence of currencies remain same then fetch the rate.
      $fmc = $jsonArr[0]["rate"]; $usd = $jsonArr[1]["rate"]; $gbp = $jsonArr[2]["rate"]; $eur = $jsonArr[3]["rate"];

    If sequence changes, then you may have to iterate the array to set desired currency rate into variable.

    1. You can create a function like
      convertCurrency($from, $to, $value) { return ($value * $to) / $from; }
    2. Now,if you want to convert 100 USD to FMC
      then call the function
      $result = convertCurrency($usd, $fmc, 100)

    Similarly, FMC to USD :: convertCurrency($fmc, $usd, 100)

    GBP to FMC :: convertCurrency($gbp, $fmc, 100)

    FMC to GBP :: convertCurrency($fmc, $gbp, 100)

    EUR to FMC :: convertCurrency($eur, $fmc, 100)

    FMC to EUR :: convertCurrency($fmc, $eur, 100)

    Replace 100 by $value that you want to convert.