PHP-cURL不输出XML数据

Question

As per the title, I'm using cURL to connect up to my webservice which should then output the response in XML format. cURL is enabled on the server as per my check, however it isn't displaying anything in the response of $xml .

define('SERVICE_URL', 'http://www.myurl.com/webservices/users');
define('USERNAME', 'user');
define('PASSWORD', 'pass');
//define('KEY', 'YOUR_KEY/SID_HERE');

$post = array(
        'UserID' => '5',
        'Name' => 'John',   
);

$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, SERVICE_URL);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($post));

curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

$result = curl_exec($ch);

curl_close($ch);

$xml = new SimpleXMLElement($result);
echo $xml;

Answer 1

First, check that $result is actually giving you a result. If it isn't, then your problem isn't with SimpleXMLElement, it's with your curl call.

Second, create an HTML form that sends your data to your URL and check to see that it's actually sending data back. If you aren't getting data, then the problem is with the service, not your curl calls.

Finally, if you're getting data in $result, then check for exceptions in your SimpleXMLElement call:

try {
  $xml = new SimpleXMLElement($result);
}
catch( Exception $e ) {
  echo "found an exception: " . $e;
}