Change purchase title of soundCloud player - php

Question

I use the script php-soundcloud (Oauth 2) and want to change the title (Buy this track) of purchase link.
I can update the link but I can not change the text of link.
I use this code:
$soundcould->put('https://api.soundcloud.com/tracks/56649403', array(
'track[purchase_url]' => 'http://website.com/',
'track[purchase_title]' => 'Support me' // whitout this, it work
));
but it returns me an error: The requested URL responded with HTTP code 422.
When i remove track[purchase_title], it work, so the problem is that variable!
Must be something special to change the link title?
Soundcloud have posed limits on the use of their API?
It's possible to create a new link other than changing the variable purchase_title?

Answer 1

The reason this is not working is because the purchase_url and purchase_title can only be changed on premium accounts. I'll look at making this more clear in the docs!
Here's a code sample that will do the trick for a premium account:
<?php
require_once 'Services/Soundcloud.php';
$client = new Services_Soundcloud('client_id', 'client_secret', 'redirect_uri');
$client->setAccessToken('your-access-token');
$track_url = 'https://api.soundcloud.com/tracks/52652023.json';
$response = json_decode($client->put($track_url, array(
'track[purchase_url]' => 'http://website.com',
'track[purchase_title]' => 'Support me'
)));
?>
If that doesn't work, the problem is elsewhere. Email me and I can help you debug further.

Answer 2

I am not sure but try it. I think it is help full to you :-
See the guide:-
http://developers.soundcloud.com/docs/api/guide
Try it
<?php
$track = <<<EOH
<track>
<downloadable>true</downloadable>
<purchase_url>http://website.com/</purchase_url>
<purchase_title>true</purchase_title>
</track>
EOH;
try {
$response = json_decode(
$soundcloud->put(
'tracks/1',
$track,
array(CURLOPT_HTTPHEADER => array('Content-Type: application/xml'))
),
true
);
} catch (Services_Soundcloud_Invalid_Http_Response_Code_Exception $e) {
exit($e->getMessage());
}