blocks|key|1196897|text|我喜欢第一个解决方案，但它似乎有很大的问题。我试图将它实现到一个支付网关中，但我一直得到1的结果。这让我感到困惑，我最终发现这是因为google使用了一个空间来存储数千个稀疏器。因此，1+500.00的金额被作为1返回，因为其余的是爆炸的。我已经为它创建了一个快速而肮脏的修复方法。如果其他人遇到过这个问题，请让我知道。以下是我的解决方案：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1196898|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);+}|code-block|syntax|javascript|1196899|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

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:

<pre><code>function currency($from_Currency,$to_Currency,$amount) {
 $amount = urlencode($amount);
 $from_Currency = urlencode($from_Currency);
 $to_Currency = urlencode($to_Currency);
 $url = "http://www.google.com/ig/calculator?hl=en&amp;q=$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); }
</code></pre>

blocks|key|1196924|text|将欧元转换为美元的示例|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1196925|$url+=+'http://www.webservicex.net/CurrencyConvertor.asmx/ConversionRate?FromCurrency=EUR&ToCurrency=USD';
++++++++++++$xml+=+simpleXML_load_file($url,"SimpleXMLElement",LIBXML_NOCDATA);
++++++++++++if($xml+===++FALSE)
++++++++++++{
+++++++++++++++//deal+with+error
++++++++++++}
++++++++++++else+{+

++++++++++++++++$rate+=+$xml;
++++++++++++}|code-block|syntax|javascript|1196926|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

An example of converting EUR to USD

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

 $rate = $xml;
 }
</code></pre>

blocks|key|982436|text|/**
+*+Rechnet+den+gegebenen+Betrag+von+einer+Währung+in+eine+andere+um
+*+@param+FLOAT+$value
+*+@param+STRING+$fromCurrency=USD+Ursprungswärung+des+Betrags
+*+@param+STRING+$toCurrency=EUR+Zielwärhung,+in+die+umgerechnet+wird
+*+@param+BOOL+$round=true+Wenn+aktiviert,+wird+der+errechnete+Wert+auf+2+Nachkommastellen+kaufmännisch+gerundet
+*+@return+ARRAY+[timestamp][datetime_iso][datetime_de][value][from][to][result]
+*/
function+calcCurrency($value=0,+$fromCurrency='USD',+$toCurrency='EUR',+$round=true)+{
++++$timestamp+=+time();
++++$fromCurrency+=+preg_replace('[%5EA-Z]',+'',+strtoupper(trim($fromCurrency)));
++++$toCurrency+=+preg_replace('[%5EA-Z]',+'',+strtoupper(trim($toCurrency)));
++++$round+=+(bool)+$round;

++++$wrongJSON+=+file_get_contents("http://www.google.com/ig/calculator?hl=en&q=1$fromCurrency=?$toCurrency");
++++$search+=+array('lhs',+'rhs',+'error',+'icc');
++++$replace+=+array('"lhs"',+'"rhs"',+'"error"',+'"icc"');
++++$json+=+str_replace($search,+$replace,+$wrongJSON);
++++$jsonData+=+json_decode($json,+true);
++++if+(''+!==+$jsonData['error'])+throw+new+Exception('FEHLER:+'.$jsonData['error']);
++++$rhs+=+explode('+',+$jsonData['rhs'],+2);

++++$calcValue+=+floatval(0.00);
++++$value+=+floatval($value);
++++$ratio+=+floatval($rhs[0]);

++++//+Gültigkeitsprüfungen
++++if+($value+<+0)+throw+new+Exception('Umzurechnender+Wert+darf+nicht+negativ+sein.');

++++//+Plausibilitätsprüfung+der+eingestellten+Währung+und+Festlegung
++++if+($toCurrency+==+$fromCurrency)+{
++++++++//+Ursprungswährung+=+Zielwährung+%7C+Es+erfolgt+keine+Berechnung
++++++++$calcValue+=+$value;
++++++++$ratio+=+1;
++++}+else+{
++++++++$calcValue+=+floatval($value+*+$ratio);
++++}

++++//+Array+mit+Rückgabewerten+erzeugen+und+zurück+geben
++++return+array(
++++++++'timestamp'+=>+$timestamp,
++++++++'datetime_iso'+=>+date('Y-m-d+H:i:s',+$timestamp),
++++++++'datetime_de'+=>+date('d.m.Y+H:i:s',+$timestamp),
++++++++'value'+=>+$value,
++++++++'from'+=>+$fromCurrency,
++++++++'to'+=>+$toCurrency,
++++++++'ratio'+=>+round($ratio,+6),
++++++++'result'+=>+(true===$round)
++++++++++++?+round($calcValue,+2)
++++++++++++:+$calcValue
++++);
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|982437|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>/**
 * Rechnet den gegebenen Betrag von einer Währung in eine andere um
 * @param FLOAT $value
 * @param STRING $fromCurrency=USD Ursprungswärung des Betrags
 * @param STRING $toCurrency=EUR Zielwärhung, in die umgerechnet wird
 * @param BOOL $round=true Wenn aktiviert, wird der errechnete Wert auf 2 Nachkommastellen kaufmännisch gerundet
 * @return ARRAY [timestamp][datetime_iso][datetime_de][value][from][to][result]
 */
function calcCurrency($value=0, $fromCurrency='USD', $toCurrency='EUR', $round=true) {
 $timestamp = time();
 $fromCurrency = preg_replace('[^A-Z]', '', strtoupper(trim($fromCurrency)));
 $toCurrency = preg_replace('[^A-Z]', '', strtoupper(trim($toCurrency)));
 $round = (bool) $round;

 $wrongJSON = file_get_contents("http://www.google.com/ig/calculator?hl=en&amp;q=1$fromCurrency=?$toCurrency");
 $search = array('lhs', 'rhs', 'error', 'icc');
 $replace = array('"lhs"', '"rhs"', '"error"', '"icc"');
 $json = str_replace($search, $replace, $wrongJSON);
 $jsonData = json_decode($json, true);
 if ('' !== $jsonData['error']) throw new Exception('FEHLER: '.$jsonData['error']);
 $rhs = explode(' ', $jsonData['rhs'], 2);

 $calcValue = floatval(0.00);
 $value = floatval($value);
 $ratio = floatval($rhs[0]);

 // Gültigkeitsprüfungen
 if ($value &lt; 0) throw new Exception('Umzurechnender Wert darf nicht negativ sein.');

 // Plausibilitätsprüfung der eingestellten Währung und Festlegung
 if ($toCurrency == $fromCurrency) {
 // Ursprungswährung = Zielwährung | Es erfolgt keine Berechnung
 $calcValue = $value;
 $ratio = 1;
 } else {
 $calcValue = floatval($value * $ratio);
 }

 // Array mit Rückgabewerten erzeugen und zurück geben
 return array(
 'timestamp' =&gt; $timestamp,
 'datetime_iso' =&gt; date('Y-m-d H:i:s', $timestamp),
 'datetime_de' =&gt; date('d.m.Y H:i:s', $timestamp),
 'value' =&gt; $value,
 'from' =&gt; $fromCurrency,
 'to' =&gt; $toCurrency,
 'ratio' =&gt; round($ratio, 6),
 'result' =&gt; (true===$round)
 ? round($calcValue, 2)
 : $calcValue
 );
}
</code></pre>

blocks|key|1196952|text|此方法使用Yahoo+currency+API完整教程：Currency+Converter+in+PHP,+Python,+Javascript+and+jQuery|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1196953|function+currencyConverter($currency_from,+$currency_to,+$currency_input)+{
++++$yql_base_url+=+"http://query.yahooapis.com/v1/public/yql";
++++$yql_query+=+'select+*+from+yahoo.finance.xchange+where+pair+in+("'+.+$currency_from+.+$currency_to+.+'")';
++++$yql_query_url+=+$yql_base_url+.+"?q="+.+urlencode($yql_query);
++++$yql_query_url+.=+"&format=json&env=store%253A%252F%252Fdatatables.org%252Falltableswithkeys";
++++$yql_session+=+curl_init($yql_query_url);
++++curl_setopt($yql_session,+CURLOPT_RETURNTRANSFER,+true);
++++$yqlexec+=+curl_exec($yql_session);
++++$yql_json+=++json_decode($yqlexec,+true);
++++$currency_output+=+(float)+$currency_input+*+$yql_json['query']['results']['rate']['Rate'];

++++return+$currency_output;
}

$currency_input+=+2;
//currency+codes+:+http://en.wikipedia.org/wiki/ISO_4217
$currency_from+=+"USD";
$currency_to+=+"INR";
$currency+=+currencyConverter($currency_from,+$currency_to,+$currency_input);

echo+$currency_input+.+'+'+.+$currency_from+.+'+=+'+.+$currency+.+'+'+.+$currency_to;|code-block|syntax|javascript|1196954|entityMap|0|LINK|mutability|MUTABLE|url|http://www.idiotinside.com/2015/01/28/create-a-currency-converter-in-php-python-javascript-and-jquery-using-yahoo-currency-api/^0|S|1K|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

This method is using Yahoo currency API 
Full tutorial : <a href="http://www.idiotinside.com/2015/01/28/create-a-currency-converter-in-php-python-javascript-and-jquery-using-yahoo-currency-api/" rel="nofollow noreferrer">Currency Converter in PHP, Python, Javascript and jQuery</a>

<pre><code>function currencyConverter($currency_from, $currency_to, $currency_input) {
 $yql_base_url = "http://query.yahooapis.com/v1/public/yql";
 $yql_query = 'select * from yahoo.finance.xchange where pair in ("' . $currency_from . $currency_to . '")';
 $yql_query_url = $yql_base_url . "?q=" . urlencode($yql_query);
 $yql_query_url .= "&amp;format=json&amp;env=store%3A%2F%2Fdatatables.org%2Falltableswithkeys";
 $yql_session = curl_init($yql_query_url);
 curl_setopt($yql_session, CURLOPT_RETURNTRANSFER, true);
 $yqlexec = curl_exec($yql_session);
 $yql_json = json_decode($yqlexec, true);
 $currency_output = (float) $currency_input * $yql_json['query']['results']['rate']['Rate'];

 return $currency_output;
}

$currency_input = 2;
//currency codes : http://en.wikipedia.org/wiki/ISO_4217
$currency_from = "USD";
$currency_to = "INR";
$currency = currencyConverter($currency_from, $currency_to, $currency_input);

echo $currency_input . ' ' . $currency_from . ' = ' . $currency . ' ' . $currency_to;
</code></pre>

blocks|key|1196969|text|这就是我正在使用的：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1196970|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);
++$get+=+explode("",$get[1]);
++$converted_amount+=+preg_replace("/[%5E0-9\.]/",+null,+$get[0]);
++return+round($converted_amount,+2);
}|code-block|syntax|javascript|1196971|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This is what I'm using:

<pre><code>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&amp;from=" . $from_Currency . "&amp;to=" . $to_Currency);

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

blocks|key|982563|text|按照Stefan+Gehrig的建议，我使用以下PHP从欧洲央行获取数据。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|982564|<?php
try+{
++++$xml_string+=+file_get_contents("https://www.ecb.europa.eu/stats/eurofxref/eurofxref-daily.xml");
++++$xml+=+new+SimpleXMLElement($xml_string);
++++$cxml+=+$xml->xpath('//*[@currency]');
++++//anchored+to+USD+in+this+case
++++$usx+=+$xml->xpath('//*[@currency="USD"]');
++++$base+=+floatval(strval($usx[0]['rate']));
++++//create+a+simple+associative+array+with+the+3-letter+code
++++//as+the+key+and+the+rate+as+the+value
++++$c_arr+=+array();
++++foreach+($cxml+as+$c)+{
++++++++$cur+=+strval($c['currency']);
++++++++$rate+=+floatval(strval($c['rate']))/$base;
++++++++$c_arr[$cur]+=+$rate;
++++}
++++//add+the+euro+since+it's+assumed+as+the+base+rate+for+the+ECB
++++$c_arr['EUR']+=+1/$base;
++++$currency_json+=+json_encode($c_arr);

++++//write+to+file
++++$file+=+"currency.json";
++++$fh+=+fopen($file,+'w')+or+die("can't+open+file");
++++fwrite($fh,+$currency_json);
++++fclose($fh);
++++echo+$currency_json;
}+catch+(Exception+$e)+{+echo+$e;+}
?>|code-block|syntax|javascript|982565|它编写了一个JSON文件，我将其作为JavaScript变量包含在内：|982566|​|982567|<script+type="text/javascript">
var+data+=+<?php+include('currency.json');+?>;
</script>|982568|982569|然后，当请求更改货币时，我可以使用由3个字母组成的货币代码(例如，data['GBP'])和JavaScript轻松获取数据。|style|CODE|982570|我使用Cron+Job每天更新一次JSON，这样它就不会在每次访问页面时都进行调用。|982571|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/3282578/currency-conversion-using-php#comment23461452_3282578^0|2|D|0|0|0|0|0|0|0|X|B|0|0^^$0|@$1|2|3|4|5|6|7|13|8|@]|9|@$A|14|B|15|1|16]]|C|$]]|$1|D|3|E|5|F|7|17|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|18|8|@]|9|@]|C|$]]|$1|K|3|L|5|6|7|19|8|@]|9|@]|C|$]]|$1|M|3|N|5|F|7|1A|8|@]|9|@]|C|$G|H]]|$1|O|3|L|5|6|7|1B|8|@]|9|@]|C|$]]|$1|P|3|Q|5|6|7|1C|8|@$A|1D|B|1E|R|S]]|9|@]|C|$]]|$1|T|3|U|5|6|7|1F|8|@]|9|@]|C|$]]|$1|V|3|-4|5|6|7|1G|8|@]|9|@]|C|$]]]|W|$X|$5|Y|Z|10|C|$11|12]]]]

I used the following PHP to pull data from the ECB as <a href="https://stackoverflow.com/questions/3282578/currency-conversion-using-php#comment23461452_3282578">Stefan Gehrig</a> suggested.

<pre class="lang-php prettyprint-override"><code>&lt;?php
try {
 $xml_string = file_get_contents("https://www.ecb.europa.eu/stats/eurofxref/eurofxref-daily.xml");
 $xml = new SimpleXMLElement($xml_string);
 $cxml = $xml-&gt;xpath('//*[@currency]');
 //anchored to USD in this case
 $usx = $xml-&gt;xpath('//*[@currency="USD"]');
 $base = floatval(strval($usx[0]['rate']));
 //create a simple associative array with the 3-letter code
 //as the key and the rate as the value
 $c_arr = array();
 foreach ($cxml as $c) {
 $cur = strval($c['currency']);
 $rate = floatval(strval($c['rate']))/$base;
 $c_arr[$cur] = $rate;
 }
 //add the euro since it's assumed as the base rate for the ECB
 $c_arr['EUR'] = 1/$base;
 $currency_json = json_encode($c_arr);

 //write to file
 $file = "currency.json";
 $fh = fopen($file, 'w') or die("can't open file");
 fwrite($fh, $currency_json);
 fclose($fh);
 echo $currency_json;
} catch (Exception $e) { echo $e; }
?&gt;
</code></pre>

It writes a JSON file that I include as a JavaScript variable:

<div class="snippet" data-lang="js" data-hide="false" data-console="false" data-babel="false">
<div class="snippet-code">
<pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;script type="text/javascript"&gt;
var data = &lt;?php include('currency.json'); ?&gt;;
&lt;/script&gt;</code></pre>
</div>
</div>


I can then easy grab the data using the 3-letter currency code (e.g., <code>data['GBP']</code>) with JavaScript when a currency change is requested.

I use a Cron Job to update the JSON once a day, so it's not making a call each time the page is visited.

blocks|key|1197091|text|这很简单，如果您使用本地服务器，如wamp或xampp或其他服务器，则必须首先在php.ini中启用openssl扩展。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1197092|extension=php_openssl.dll+`allow_url_fopen+=+On`|code-block|syntax|javascript|1197093|然后您将能够运行我的代码，否则您正在运行您的网站与在线主机，然后您不需要这样做，所以您必须添加此php函数在您的php脚本|1197094|<?php
function+currencyCnv(+$amount,+$from,+$to){
$get+=+file_get_contents("https://www.google.com/finance/converter?a=$amount&from="+.+$from.+"&to="+.+$to);
$get+=+explode("<span+class=bld>",$get);
$get+=+explode("",$get[1]);
$converted_amount+=+$get[0];
echo+round($converted_amount,2);
}

++currencyCnv(100,'GBP','PKR');
//currencyCnv(you+amount+from+form+input+filed+,currency+from+select+box,currency+to+select+box)
//any+currency+convert+with+this+code+|1197095|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

This is so simple if you use a local server like wamp or xampp or other server then you should have to enable extension of openssl first in php.ini 

<pre><code>extension=php_openssl.dll `allow_url_fopen = On`
</code></pre>

then you will be able to run my code 
 else you are runing your website with online hosting then you dont need to do this so you have to add this php function in your php script

<pre><code>&lt;?php
function currencyCnv( $amount, $from, $to){
$get = file_get_contents("https://www.google.com/finance/converter?a=$amount&amp;from=" . $from. "&amp;to=" . $to);
$get = explode("&lt;span class=bld&gt;",$get);
$get = explode("&lt;/span&gt;",$get[1]);
$converted_amount = $get[0];
echo round($converted_amount,2);
}

 currencyCnv(100,'GBP','PKR');
//currencyCnv(you amount from form input filed ,currency from select box,currency to select box)
//any currency convert with this code 
</code></pre>

blocks|key|1197114|text|使用这个简单的函数：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1197115|function+convertCurrency($amount,+$from,+$to){
++++$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("/[%5E0-9.]/",+"",+$converted[1]);
++++return+round($converted,+3);
}|code-block|syntax|javascript|1197116|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

use this simple function :

<pre><code>function convertCurrency($amount, $from, $to){
 $url = "https://www.google.com/finance/converter?a=$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.]/", "", $converted[1]);
 return round($converted, 3);
}
</code></pre>

blocks|key|982705|text|您还可以查看：https://free.currencyconverterapi.com|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|982706|免责声明，我是这个网站的作者。|982707|示例转换URL为：http://free.currencyconverterapi.com/api/v6/convert?q=PHP_EUR,EUR_PHP&compact=ultra&apiKey=sample-api-key，它将以json格式返回值，例如{"PHP_EUR":0.016434，"EUR_PHP":60.849184}|982708|你应该注意到限制，比如最大的请求和查询(详细信息可以在网站上找到)。我已经实现了限制，因为已经有滥用服务的人。|982709|我从2014年就开始这样做了，从那以后就一直在运行(除了链接更改和维护停机的时间)。我个人在我的其他网站上使用它，并公开提供服务，这样它也可以帮助其他开发人员。|982710|无论如何，希望这能有所帮助，下面是一段示例PHP代码：|982711|<?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"));
?>+|code-block|syntax|javascript|982712|entityMap|0|LINK|mutability|MUTABLE|url|https://free.currencyconverterapi.com/|1|http://free.currencyconverterapi.com/api/v6/convert?q=PHP_EUR,EUR_PHP&compact=ultra&apiKey=sample-api-key^0|7|11|0|0|0|9|2X|1|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@$A|13|B|14|1|15]]|C|$]]|$1|D|3|E|5|6|7|16|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|17|8|@]|9|@$A|18|B|19|1|1A]]|C|$]]|$1|H|3|I|5|6|7|1B|8|@]|9|@]|C|$]]|$1|J|3|K|5|6|7|1C|8|@]|9|@]|C|$]]|$1|L|3|M|5|6|7|1D|8|@]|9|@]|C|$]]|$1|N|3|O|5|P|7|1E|8|@]|9|@]|C|$Q|R]]|$1|S|3|-4|5|6|7|1F|8|@]|9|@]|C|$]]]|T|$U|$5|V|W|X|C|$Y|Z]]|10|$5|V|W|X|C|$Y|11]]]]

You can also check: <a href="https://free.currencyconverterapi.com" rel="nofollow noreferrer">https://free.currencyconverterapi.com</a>

Disclaimer, I'm the author of this website.

A sample conversion URL is: <a href="http://free.currencyconverterapi.com/api/v6/convert?q=PHP_EUR,EUR_PHP&amp;compact=ultra&amp;apiKey=sample-api-key" rel="nofollow noreferrer">http://free.currencyconverterapi.com/api/v6/convert?q=PHP_EUR,EUR_PHP&amp;compact=ultra&amp;apiKey=sample-api-key</a> 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:

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

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

echo(convertCurrency(5, "USD", "PHP"));
?&gt; 
</code></pre>

blocks|key|1197217|text|请查看下面的货币兑换示例。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1197218|++++function+oneUSDTo($amount,+$toCurrency)
{
$currencyUrl+=+$amount."usd%2Bto%2B$toCurrency";
$url+=+"https://www.google.com/search?q=".$currencyUrl;
$ch+=+curl_init();
curl_setopt($ch,+CURLOPT_URL,$url);
curl_setopt($ch,+CURLOPT_RETURNTRANSFER,+1);

$result+=+curl_exec($ch);
$data+=+explode("$amount+US+Dollar+=+",$result);
return+(float)+substr($data[1],0,10);
}

//Usage:+oneUSDTo("type+currency+code+here");
echo+oneUSDTo("5","EUR");|code-block|syntax|javascript|1197219|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Please check below currency change example.

<pre><code> function oneUSDTo($amount, $toCurrency)
{
$currencyUrl = $amount."usd+to+$toCurrency";
$url = "https://www.google.com/search?q=".$currencyUrl;
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,$url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

$result = curl_exec($ch);
$data = explode("$amount US Dollar = ",$result);
return (float) substr($data[1],0,10);
}

//Usage: oneUSDTo("type currency code here");
echo oneUSDTo("5","EUR");
</code></pre>

blocks|key|982782|text|https://fincharts.info/charts/exchange/?key=api_key&&from=USD&to=GBP,BWP,ZAR&amount=45854&date=2018-03-03&base=USD|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|982783|看来你必须注册一个api密钥，我想。|unstyled|982784|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

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

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

blocks|key|1197314|text|使用货币转换器PHP的给定代码|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1197315|public+function+convertCurrency($from,+$to,+$amount)++++
{
++++$url+=+file_get_contents('https://free.currencyconverterapi.com/api/v5/convert?q='+.+$from+.+'_'+.+$to+.+'&compact=ultra');
++++$json+=+json_decode($url,+true);
++++$rate+=+implode("+",$json);
++++$total+=+$rate+*+$amount;
++++$rounded+=+round($total);
++++return+$total;
}|code-block|syntax|javascript|1197316|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Use Given code for currency Converter PHP

<pre><code>public function convertCurrency($from, $to, $amount) 
{
 $url = file_get_contents('https://free.currencyconverterapi.com/api/v5/convert?q=' . $from . '_' . $to . '&amp;compact=ultra');
 $json = json_decode($url, true);
 $rate = implode(" ",$json);
 $total = $rate * $amount;
 $rounded = round($total);
 return $total;
}
</code></pre>

blocks|key|982835|text|<?php
//++replace+this+key+from++fixer.io+after+getting++a+free+API+access+key:

$API+=+'314259bbe6de76b961c84a5244ac0fc0';

function+convertCurrency($API,+$amount,+$from+=+'EUR',+$to+=+'USD'){
++$curl+=+file_get_contents("http://data.fixer.io/api/latest?access_key=$API&symbols=$from,$to");

++if($curl)
++{
++++$arr+=+json_decode($curl,true);
++++if($arr['success'])
++++{
++++++++$from+=+$arr['rates'][$from];
++++++++$to+=+$arr['rates'][$to];

++++++++$rate+=+$to+/+$from;
++++++++$result+=+round($amount+*+$rate,+6);
++++++++return+$result;
++++}else{
++++++++echo+$arr['error']['info'];
++++}
++}else{
++++echo+"Error+reaching+api";
++}
}

echo+convertCurrency($API,+1,+'USD',+'EGP');|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|982836|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>&lt;?php
// replace this key from fixer.io after getting a free API access key:

$API = '314259bbe6de76b961c84a5244ac0fc0';

function convertCurrency($API, $amount, $from = 'EUR', $to = 'USD'){
 $curl = file_get_contents("http://data.fixer.io/api/latest?access_key=$API&amp;symbols=$from,$to");

 if($curl)
 {
 $arr = json_decode($curl,true);
 if($arr['success'])
 {
 $from = $arr['rates'][$from];
 $to = $arr['rates'][$to];

 $rate = $to / $from;
 $result = round($amount * $rate, 6);
 return $result;
 }else{
 echo $arr['error']['info'];
 }
 }else{
 echo "Error reaching api";
 }
}

echo convertCurrency($API, 1, 'USD', 'EGP');
</code></pre>

blocks|key|1197354|text|在搜索了很多次之后，找到了这个。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1197355|//+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...
++++}
}|code-block|syntax|javascript|1197356|这工作得很好。该代码片段来自：https://www.exchangerate-api.com/docs/php-currency-api|offset|length|1197357|entityMap|0|LINK|mutability|MUTABLE|url|https://www.exchangerate-api.com/docs/php-currency-api^0|0|0|F|1I|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

After searching a lot, found this. 

<pre><code>// 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-&gt;rates-&gt;EUR), 2);

 }
 catch(Exception $e) {
 // Handle JSON parse error...
 }
}
</code></pre>

This is working fine. 
The snippet is from: <a href="https://www.exchangerate-api.com/docs/php-currency-api" rel="noreferrer">https://www.exchangerate-api.com/docs/php-currency-api</a>

I'm looking for a way to convert any amount from one currency to another on a website. The user would enter something like '100' and select USD as the currency, and then chooses Australian or Canadian dollars as the currency to convert to. When he clicks the 'Convert' button, I'd like to convert that amount automatically, through some API, and show him the amount in the currency he chose to convert to.

Any ideas?

Currency Conversion using PHP

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我正在寻找一种方法来转换任何金额从一个货币到另一个网站上。用户将输入类似于'100‘的内容，并选择USD作为货币，然后选择澳元或加拿大元作为要转换为的货币。当他点击“转换”按钮时，我想通过一些API自动转换金额，并向他显示他选择转换为的货币金额。有什么想法吗？

问使用PHP进行货币换算
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