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I'm using a REST API through PHP and I'm a bit confused on the CURL_POSTFIELDS behavior, which implies that I must send a querystring or array, but what I'm seeking to do is just to send a string of JSON text.

In the API I'm using there is no such thing as a field: https://developer.atlassian.com/display/JIRADEV/JIRA+REST+API+Example+-+Edit+issues

So, how can I just send data that doesn't get interpreted as a query string, and without having to use a file?

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Try: curl_setopt($ch, CURLOPT_POST, TRUE); – Yannis Rizos♦ May 27 at 20:28
Actually, I'm using CURLOPT_CUSTOMREQUEST with $_SERVER['REQUEST_METHOD'] to handle custom methods, the method is not the problem – dukeofgaming May 27 at 20:38
If you don't set CURLOPT_POST to true, you aren't sending a regular (application/x-www-form-urlencoded) POST request. Try it out and see what happens. Reading your question a second time, I think I'm completely missing its point. Care to be a bit more specific on exactly what you are trying to do and why you even looked at CURL_POSTFIELDS? All the API's examples are PUT requests, not POST ones. – Yannis Rizos♦ May 27 at 20:41

2 Answers

up vote 1 down vote accepted

Turns out all I needed was:

curl_setopt($ch, CURLOPT_HTTPHEADER, array(
    'Content-Type: application/json',
    'Content-Length: ' . strlen($data_string))                    
);

That way the content sent in the POSTFIELDS gets interpreted the right way. Source: http://www.lornajane.net/posts/2011/posting-json-data-with-php-curl

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up vote 0 down vote

I found an article about using JSON with PHP/CURL

In general, we do pretty much this but with an XML-RPC request:

curl_setopt($cnxn, CURLOPT_POST, TRUE);
curl_setopt($cnxn, CURLOPT_RETURNTRANSFER, TRUE);
curl_setopt($cnxn, CURLOPT_POSTFIELDS, $body);

We just build the XML document for the RPC request into the $body variable, and our server will read it as the request body. We use Zend Framework MVC, but you can read the incoming raw request body from the php://input stream if you're rolling your own.

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