我想将货币从美元转换为印度卢比,以美元为单位的值可从url中检索,我想根据当前汇率将其转换成印度卢比。这是第一个代码:
<?php
require_once('currency.php');
$val=$_GET["val"];
echo currency($val);
?>
第二个代码是:
<?php
function currency($val) {
$amount = $val;
$url = "http://www.google.com/ig/calculator?hl=en&q=$amountUSD=?INR";
$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']);
$var = $data['0'];
return round($var,3);
}
?>
顺便说一句,我在免费托管网站0fees.net上测试了这段代码,所以当我尝试实时美元到印度卢比的转换时,这有什么问题吗。
错误在于以下代码:
function currency($val) {
$amount = $val;
$url = "http://www.google.com/ig/calculator?hl=en&q=$amountUSD=?INR";
// ... ^^^^^^^^^^
}
php试图评估变量$amountUSD
(根据php的字符串解析规则),但失败了,并发出通知:
PHP Notice: Undefined variable: amountUSD in usdtoinr.php code on line 3
相反,你应该写:
function currency($val) {
$amount = floatval($val);
$url = 'http://www.google.com/ig/calculator?hl=en&q=' . $amount . 'USD=?INR';
// ...
}
要在将来捕获这些错误,请确保在开发机器上将error_reporting
设置为E_ALL | E_STRICT
。
此外,谷歌查询的结果是一个JSON文档。由于对象中属性的顺序可能会有所不同,因此必须使用适当的JSON解析器(如json_decode
)对其进行解析,如下所示:
$data = json_decode($rawdata, true);
$tmp = explode(' ', $data['rhs']);
return floatval($tmp[0]);
一般来说,在用户代理中包含对实际用户代理(例如软件主页)的提示也是一个好主意。
使用此PHP代码
<?php
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']);
$var = $data[0];
return round($var,3);
}
?>
并将其用于输出,当您输入任何金额时,它将从美元转换为印度卢比
<?php
require_once('currency.php');
$amount=@$_GET["val"];
$from='USD';
$to='INR';
echo currency($from,$to,$amount);
?>
<form method="get" ><input name="val" type="text"><input type="submit" value="Submit"></form>