谷歌货币转换器api用于大量数据

问题描述：

I am using google finance calculator to convert currency. I have to convert atleast = 2000 numbers to be converted at once. Below I have set only 10 numbers in the array. When I run this code, it is working fine but it is taking too much time. When I try with around 5000 numbers, it sometimes time out error. Can anybody help me how can I modify with my code for large number of datas. Thank you. Below is code that I am currently using.

$amounts= array(10, 20, 30, 40, 50, 60, 70, 80, 90, 100);
$from_Curr ='USD';
$to_Curr = 'THB';
$convertedCurrency = convertCurrency($amounts, $from_Curr, $to_Curr);
print_r($convertedCurrency);

function convertCurrency($amounts= array(), $from, $to){
    $convertedCurrency = array();
    foreach ($amounts as $amount) {
        $url  = "https://www.google.com/finance/converter?a=$amount&from=$from&to=$to";
        $data = file_get_contents($url);
        preg_match("/<span class=bld>(.*)<\/span>/",$data, $converted);
        $converted = preg_replace("/[^0-9.]/", "", $converted[1]);
        array_push($convertedCurrency, round($converted, 3));
    }
    return $convertedCurrency;
}

我正在使用谷歌金融计算器转换货币。我必须转换至少= 2000个数字才能立即转换。下面我在数组中只设置了10个数字。当我运行此代码时，它工作正常，但它花费了太多时间。当我尝试使用大约5000个数字时，它有时会超时错误。任何人都可以帮助我如何使用我的代码修改大量数据。谢谢。下面是我目前使用的代码。 p>

  $ amount = array（10,20,30,40,50,60,70,80,90,100）; \  n $ from_Curr ='USD'; 
 $ to_Curr ='THB'; 
 $ convertedCurrency = convertCurrency（$ amount，$ from_Curr，$ to_Curr）; 
print_r（$ convertedCurrency）; 
 
function convertCurrency（$ amount =  array（），$ from，$ to）{
 $ convertedCurrency = array（）; 
 foreach（$ amount as $ amount）{
 $ url =“https://www.google.com/finance/converter  ？a = $ amount＆amp; from = $ from＆amp; to = $ to“; 
 $ data = file_get_contents（$ url）; 
 preg_match（”/＆lt; span class = bld＆gt;（。*）＆lt; \ / span＆gt  ; /“，$ data，$ converted）; 
 $ converted = preg_replace（”/ [^ 0-9。] /“，”“，$ converted [1]）; 
 array_push（$ convertedCurrency，round（$ 转换，3））; 
} 
返回$ convertedCurrency; 
} 
  code>  pre> 
  div>

答

Let's imagine a request gets anwered in 50ms, you can do the calculation yourself for 5000 requests...

Change the method of approaching the problem : exchange rates are linear, so you just need one answer, and you can do after the exchange calculation without the API. A multiplication operation is much faster than an API request. Ask the API for the counter value of 1 USD, and then multiply each USD amount by the obtained value :

$amounts = array(10, 20, 30, 40, 50, 60, 70, 80, 90, 100);

$from_Curr = 'USD';
$to_Curr = 'THB';

$convertedCurrency = convertCurrency($amounts, $from_Curr, $to_Curr);
print_r($amounts);
print_r($convertedCurrency);

function convertCurrency($amounts = array(), $from, $to) {
    $convertedCurrency = array();
    $amount = 1;

    $url = "https://finance.google.com/finance/converter?a=$amount&from=$from&to=$to";
    $data = file_get_contents($url);
    preg_match("/<span class=bld>(.*?)<\/span>/", $data, $converted);
    $converted = preg_replace("/[^0-9.]/", "", $converted[1]);

    foreach ($amounts as $amount) {
        $convertedCurrency[] = $amount * $converted;
    }

    return $convertedCurrency;
}

Sidenote: changed the regex to a non greedy match (.*?), in case spans are added lataer in the page.

答

You are using a free service right ? that's probably why you are getting a timeout error. there's a limit for requesting a response from the service which is why you get an error when that limit is reached. e.i how many requests over a specific period of time

You either look for a paid service that can intake your requirements ( 5000 responses at once )

Or change your request to a lesser number of times ( lesser than 5000).

for the code itself , I know that foreach is considered slow, try another looping solution.

谷歌货币转换器api用于大量数据

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