PHP Curl equivalent of command line curl - php

Question

I have a working command line curl command
curl -v -d '{"auth": {"passwordCredentials": {"username": "myusername", "password": "mypassword"}}}' -H 'Content-type: application/json' myurl
I am trying to write equivalent PHP curl command -
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, myurl);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POST, true);
$data = array('json' => '{auth: {passwordCredentials : {username : myusername, password : mypassword }}}');
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
$output = curl_exec($ch);
echo $output;
I am having different response for both the calls.
I have doubt about setting the json data correctly.

Answer 1

Along with your curl request, also send the HTTP header. For example:
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-type: application/json'));
And the post data should be:
$post_data = '{auth: {passwordCredentials : {username : myusername, password : mypassword }}}';
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);

Answer 2

You can use the json_encode function to make sure that things are properly encoded.
See for example https://stackoverflow.com/a/4271654/1967396 .
In your case, it might look like this:
$authData = array(auth => array(passwordCredentials => array( username => floris, password => secret )));
and then you create the POST data with
curl_setopt($ch, CURLOPT_POSTFIELDS, array('json'=>json_encode($authData)));
If you do
print json_encode($authData);
you get
{"auth":{"passwordCredentials":{"username":"floris","password":"secret"}}}
Presumably you could do this manually, without the json_encode function.