How does this curl command differ from my php code?

Question

I am simply trying to duplicate this curl command in PHP:

curl -X POST -H 'Content-Type: application/xml' -u username:password https://api.company.com/api/path

This is the PHP code I am using:

$ch = curl_init("https://api.company.com/api/path");

curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, array("Content-Type: application/xml"));
curl_setopt($ch, CURLOPT_USERPWD, $username . ":" . $password);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

$response = curl_exec($ch);  // $response is null
$info = curl_getinfo($ch);   // $info['http_code'] is 400

While my shell command is successful and I get data back from the server, this PHP code fails -- the server returns a 400 error. As far as I know, the PHP code and the shell command are effectively identical, so what's the difference I am missing?

Edit:

Here is the info I get from verbose mode:

* About to connect() to api.company.com port 443 (#0)
*   Trying xxx.xxx.xxx.xxx...
* connected
* Connected to api.company.com (xxx.xxx.xxx.xxx) port 443 (#0)
* successfully set certificate verify locations:
*   CAfile: /etc/pki/tls/certs/ca-bundle.crt
  CApath: none
* SSL connection using AES256-SHA
* Server certificate:
*    [...]
*    SSL certificate verify ok.
* Server auth using Basic with user 'username'
> POST /api/path HTTP/1.1
Authorization: Basic [...]
Host: api.company.com
Accept: */*
Content-Type: application/xml
Content-Length: -1
Expect: 100-continue

< HTTP/1.1 400 BAD_REQUEST
< Content-Length: 0
< Connection: Close
< 
* Closing connection #0

Edit 2

I tried adding the following to the script:

curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);

But this did not change the server's response.

Can you get any error information from the remote server? That should be your very first step — Phil
– Phil, Commented Sep 18, 2013 at 1:11
Can you set curl_setopt($ch, CURLOPT_VERBOSE, TRUE) as well and check? — Karan Ashar
– Karan Ashar, Commented Sep 18, 2013 at 1:12
@KaranAshar: I've just added the result of that to the end of the question. — Kosmonaut
– Kosmonaut, Commented Sep 18, 2013 at 1:32
Try adding curl_setopt($curl, CURLOPT_HTTPAUTH, CURLAUTH_BASIC); — subroutines
– subroutines, Commented Sep 18, 2013 at 3:19
@subroutines: Thanks for the idea; unfortunately I get the same response from the server. — Kosmonaut
– Kosmonaut, Commented Sep 18, 2013 at 14:33

Kosmonaut · Accepted Answer · 2013-09-18 15:55:02Z

1

I figured out the missing piece. I needed to explicitly set CURLOPT_POSTFIELDS to null:

curl_setopt($ch, CURLOPT_POSTFIELDS, null);

After adding that line, things now work just as they did with the shell command.

answered Sep 18, 2013 at 15:55

Kosmonaut

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