Description:
------------
On OSX 10.10.5, I created a clean install of Twitter OAuth using composer

https://github.com/abraham/twitteroauth

and ran the test script below with a valid CONSUMER_KEY, CONSUMER_SECRET (validated using the Twitter OAuth tool that returns the expected result).

 php -S localhost:1234

PHP version is PHP 5.5.27 (cli) (built: Jul 23 2015 00:21:59)


Test script:
---------------
<?php 

    require "vendor/autoload.php";
    use Abraham\TwitterOAuth\TwitterOAuth;

    define('CONSUMER_KEY', '...');
    define('CONSUMER_SECRET', '..');
    define('OAUTH_CALLBACK', 'test2.php');

    $connection = new TwitterOAuth(CONSUMER_KEY, CONSUMER_SECRET);
    $request_token = $connection->oauth('oauth/request_token', array('oauth_callback' => OAUTH_CALLBACK));

?>


Expected result:
----------------
The script should above should return an oauth token.

Actual result:
--------------
/test.php - Uncaught exception 'Abraham\TwitterOAuth\TwitterOAuthException' in      /Users/username/Dev/twitter/vendor/abraham/twitteroauth/src/TwitterOAuth.php:141
Stack trace:
#0 /Users/username/Dev/twitter/test.php(12): Abraham\TwitterOAuth\TwitterOAuth->oauth('oauth/request_t...', Array)
#1 {main}
thrown in /Users/username/Dev/twitter/vendor/abraham/twitteroauth/src/TwitterOAuth.php on line 141


$curlErrno = curl_errno($curlHandle);

var_dump($curlErrno);

results in int(3), which from http://php.net/manual/en/function.curl-errno.php is [3] => 'CURLE_URL_MALFORMAT'.

Note this issue does not occur on PHP 5.6.11 (cli) (built: Jul 10 2015 22:36:04).