Json_Decode 未解码我的 JSON

Question

I am using couchDB to get a UUID so that I can send a new document to the database.

In order to get this UUID, I use a curl statement:

function getUUID(){
    $myCurlSubmit = curl_init();

    curl_setopt($myCurlSubmit, CURLOPT_URL, 'http://localhost:5984/_uuids');    
    curl_setopt($myCurlSubmit, CURLOPT_HEADER, 0);

    $response = curl_exec($myCurlSubmit);

    curl_close($myCurlSubmit);

    return $response;
}

This returns the expected result:

{"uuids":["af09ffd3cf4b35c2d94d1ed755000fb8"]}

However, the following json_decode fails:

print_r('No match, creating new document.');
$uuid = json_decode(trim(getUUID()));
var_dump(json_last_error());

The error printed is: 'int(0)' (not in quotes.), and $uuid is a json string still.

Help appreciated Thank you!

EDIT:

var_dump($uuid) = int(1)

EDIT: var_dump(getUUID()) = {"uuids":["af09ffd3cf4b35c2d94d1ed755000fb8"]}\n1

Is there any reason why I would have a trailing one, and /n on my json??

EDIT:

The problem was with curl, look at the answer below!

Answer 1

The problem lies in the use of curl in the getUUID() function.

You must set CURLOPT_RETURNTRANSFER , otherwise curl_exec will just echo the result, while returning 1 (as you see).

See for example this comment in the curl_exec manual: http://www.php.net/manual/de/function.curl-exec.php#13020