PHP 如何从网络服务获取内容?

How PHP get the content from web service?

我在从 Web 服务获取 content/array 到我的 php 代码时遇到问题。当我在浏览器中输入 url 如 http://server1-xeon.asuscomm.com/currency/?amount=1.20,from=MYR,to=SGD 时,浏览器中的结果显示如下: [ 1.20MYR , 0.39SGD ]。我的 PHP 代码如下所示:

$ch = curl_init('http://server1-xeon.asuscomm.com/currency/?amount=1.20,from=MYR,to=SGD');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$content = curl_exec($ch);
curl_close($ch);
echo $content;

不幸的是,我没有使用上面的代码。寻求帮助。 谢谢

已更新

 $data=array(
'amount'=>1.2,
'fromCurrency'=>'MYR',
'toCurrency'=>'SGD'
 );

 $data_string = json_encode($data);

 $ch = curl_init('http://server1-xeon.asuscomm.com/currency/WebService.asmx/YaHOO_CurrencyEx');

 curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'POST');                                                                     
 curl_setopt($ch, CURLOPT_POSTFIELDS, $data_string);                                                                  
 curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);                                                                      
 curl_setopt($ch, CURLOPT_HTTPHEADER, 
    array('Content-type: application/json'));                                                                                                       
$content= curl_exec($ch);
curl_close($ch);
$obj = json_decode($content);
echo $obj;

此页面包含由 JavaScript 加载的动态内容。您可以在 Google Chrome 中看到它,例如通过访问 view-source:http://server1-xeon.asuscomm.com/currency/?amount=1.20,from=MYR,to=SGD.

如果您仔细查看页面的源代码(文件 http://server1-xeon.asuscomm.com/currency/JQuery/app_converter.js),您会发现它使用以下代码在幕后获取交换数据:

$.ajax({type: "POST",
        url: "WebService.asmx/YaHOO_CurrencyEx",  // important: it's a relative URL!
        data: "{amount:" + amount + ",fromCurrency:'" + from + "',toCurrency:'" + to + "'}",
        contentType: "application/json; charset=utf-8",
        dataType: "json",
        beforeSend: function () {},
        success: function (data) {
            $('#results').html(' [ ' + amount + from + ' , ' + data.d.toFixed(2) + to + ' ] ');
        });

因此,实际上您可以在 PHP 中提出此类请求,以避免访问 http://server1-xeon.asuscomm.com/currency/?amount=1.20,from=MYR,to=SGD 页面上的动态内容。

更新: 我添加了更完整的解释。

http://server1-xeon.asuscomm.com/currency/?amount=1.20,from=MYR,to=SGD is loaded, a JavaScript code on this page (it means that it's executed on the client side, in a browser, not on your server) parses URL parameters and makes AJAX POST request to the URL http://server1-xeon.asuscomm.com/currency/WebService.asmx/YaHOO_CurrencyEx. It passes a JSON payload {amount:1.20,fromCurrency:'MYR',toCurrency:'SGD'} and gets a response like this {"d":0.390360}. So, you can just make a direct POST request to the http://server1-xeon.asuscomm.com/currency/WebService.asmx/YaHOO_CurrencyEx 上的页面通过 curl 时,在 JSON 正文中传递 amountfromCurrencytoCurrency 以及然后使用 json_decode($content);.

解码收到的 JSON 响应

数据应该如何显示?从 "UPDATED" 和 运行:

将其添加到您的代码中
$array["MYR"] = 1.2;
$array["SGD"] = doubleval($obj->d)

// Print simple array (print source for example)
echo "<pre>";
print_r($array);
echo "</pre>";

// Print true JSON-array
print_r(json_encode($array));

在网络浏览器中您将看到:

Array
(
    [MYR] => 1.2
    [SGD] => 0.39036
)

{"MYR":1.2,"SGD":0.39036}

暂时无法理解您的问题。

如果您只想打印返回值(数字),请执行此操作:echo $obj->d;