如何在PHP中发出HTTP POST XML请求实际上将XML数据发送到供应商的服务器？

Question

I'm working on some PHP code, that will generate an dynamic XML output that I want to HTTP POST to my Vendor's Server.

My main goal is to get my item stock level synchronized with my Vendor's stock level, and when I POST the request as input, I should get an output back from their server.

I am creating the xml string with DOMDocument, and so far this is no problem, it works fine.

But when I am trying to HTTP POST using the "cUrl" method or the "file_get_contents()" method. The connection is made, but the server response is an error saying "No XML was recieved in HTTP POST".

Im just using the standard code, as explained in this article Sending XML data using HTTP POST with PHP Like many other articles explaning the two methods.

The cUrl Method:

$post_data = //the raw xml string or XML file from the DOMDocument.

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "http://websiteURL");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1 );
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);
$content=curl_exec($ch);

or The file_get_contents() method:

$stream_options = array(
'http' => array(
    'method'  => 'POST',
    'header'  => 'Content-type: application/x-www-form-urlencoded' . "\r\n",
    'content' =>  $post_data));

$context  = stream_context_create($stream_options);
$response = file_get_contents($url, null, $context);

Both methods gives me a response from the server, that "No XML was recieved in HTTP POST".

If I print_r($post_data); it shows the xml string that i want to send. Like:

1. <?xml version="1.0" encoding="UTF-8"?> 
2. <pnarequest><customer.nr>some no.</customer_nr><password>some no.</password><Item><vare_nr>some sku no.</vare_nr>

New Info:

My vendor says they recieve my HTTP POST, but the content in the post is the variable "$post_data" as plain text, not the content inside the variable.

Can someone please help me understanding why the XML data is not being Posted?

Thanks.

The answer to my question: I needed to create the key "xml=" within the post, with my xml ($Post_data) as variable. Also i needed to get the correct user information from my vendor, to put into my xml variable. Now it works! - Thanks to everyone who has helped to comment on this issue.

Answer 1

It looks like you're not encoding the post data and you haven't defined a variable name for the XML field. The HTTP request here, since you're using post, should look like a request sent from a form with a single textarea.

<?php

$post_data = rawurlencode($post_data);   
curl_setopt($ch, CURLOPT_POSTFIELDS, 'xml=' . $post_data);

?>

---

If you need to include more variables with the POST data.

<?php

$key = '12345';

$post_data =
    'xml=' . rawurlencode($post_data) .
    '&key=' . rawurlencode($key);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);

?>

---

This is my last example code for you. You're not posting correctly using keys and values. You said you've used the example curl code from the other question, except you aren't, because they clearly used keys and values in the accepted answer and you did not. Also, I just checked the form that they have available on the site. The key name should be 'xml', just as I expected and the post should look like a form with a single textarea, just as I expected.

<?php

$xml = '<?xml version="1.0"...';

$post_data =
    'xml=' . rawurlencode($post_data) .
    '&key=' . rawurlencode($key);

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "http://websiteURL");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1 );
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);
$content=curl_exec($ch);