如何通过 PHP 访问 RESTful API
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How to access RESTful API via PHP
提问by Matthias Loeks
I'm pretty new to PHP and the whole thing of working with RESTful APIs. All I want to do at the moment is successfully issue a plain HTTP GET request to the OpenStreetMap API.
我对 PHP 以及使用 RESTful API 的整个过程很陌生。我现在想要做的就是成功地向OpenStreetMap API发出一个普通的 HTTP GET 请求。
I am using the simple PHP REST client by tcdentand I basically understand it's functionality. My example code for getting the current Changesets in OSM is:
我正在使用tcdent的简单 PHP REST 客户端，我基本上了解它的功能。我在 OSM 中获取当前变更集的示例代码是：
<?php
include("restclient.php");
$api = new RestClient(array(
'base_url' => "http://api.openstreetmaps.org/",
'format' => "xml")
);
$result = $api->get("api/0.6/changesets");
if($result->info->http_code < 400) {
echo "success:<br/><br/>";
} else {
echo "failed:<br/><br/>";
}
echo $result->response;
?>
When I enter the URL "http://api.openstreetmaps.org/api/0.6/changesets" in the browser, it delivers the XML file. However, through this PHP code it returns the OSM 404 File not Found page.
当我在浏览器中输入 URL“http://api.openstreetmaps.org/api/0.6/changesets”时，它会提供 XML 文件。但是，通过此 PHP 代码，它返回 OSM 404 File not Found 页面。
I guess this is a rather stupid PHP-newbie question but I cannot see what I am missing, since I do not know much (yet) about all these client-server side processes etc.
我想这是一个相当愚蠢的 PHP 新手问题，但我看不出我遗漏了什么，因为我（还）对所有这些客户端-服务器端进程等知之甚少。
Thanks for your help!
谢谢你的帮助！
回答by Martin Stein
Use curl. See http://www.lornajane.net/posts/2008/using-curl-and-php-to-talk-to-a-rest-service
使用卷曲。见http://www.lornajane.net/posts/2008/using-curl-and-php-to-talk-to-a-rest-service
$service_url = 'http://example.com/rest/user/';
$curl = curl_init($service_url);
$curl_post_data = array(
"user_id" => 42,
"emailaddress" => '[email protected]',
);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_POST, true);
curl_setopt($curl, CURLOPT_POSTFIELDS, $curl_post_data);
$curl_response = curl_exec($curl);
curl_close($curl);
$xml = new SimpleXMLElement($curl_response);
$xml = new SimpleXMLElement($curl_response);
回答by Matthias Loeks
OK, the problem was apparently the 'format' => "xml" specification. Without it and with the help of SimpleXMLElement (thanks Martin), I am now getting the XML data loaded properly:
好的，问题显然是“格式”=>“xml”规范。没有它并在 SimpleXMLElement 的帮助下（感谢 Martin），我现在可以正确加载 XML 数据：
<?php
include("restclient.php");
$api = new RestClient();
$result = $api->get("http://api.openstreetmap.org/api/capabilities");
$code = $result->info->http_code;
if($code == 200) {
$xml = new SimpleXMLElement($result->response);
echo "Loaded XML, root element: ".$xml->getName();
} else {
echo "GET failed, error code: ".$code;
}
?>
Although this is not a very flexible approach since it works only for XML responses, it is enough for the moment and a good point to start with the OSM API.
尽管这不是一种非常灵活的方法，因为它仅适用于 XML 响应，但目前已经足够，并且是从 OSM API 开始的好方法。
Thanks for your help!
谢谢你的帮助！
