PHP致命错误：PHP 5.5中找不到类'Curl'

Question

I'm trying to run this code:

<?php 

    $url = 'https://api.stackexchange.com/2.1/comments';
    $data = array("site" => 'graphicdesign', "key" => "W*i*e*V*M*N*F*y*b*t*R*((", "filter" => "!2.5sIHWRkCVWC)rFPY_1P", "order" => "desc", "sort" => "creation");

    $httpresponse = (new Curl)->exec($url . '?' . http_build_query($data), [CURLOPT_ENCODING => 'gzip']); //Line 6

    $obj = json_decode($httpresponse);
    $response = $obj->{'items'};

However, it fails with this error:

$ php getcomments.php 
PHP Fatal error:  Class 'Curl' not found in /home/me/gdcommentgetter/getcomments.php on line 6

From my previous question, I though it might be a problem with my PHP version - class member access on instantiation ((new Object)->method()) wasn't available until PHP 5.4.

php --version, though, shows that I'm on a version > 5.4:

$ php --version
PHP 5.5.7-1+sury.org~precise+1 (cli) (built: Dec 12 2013 21:48:51) 
Copyright (c) 1997-2013 The PHP Group
Zend Engine v2.5.0, Copyright (c) 1998-2013 Zend Technologies
    with Zend OPcache v7.0.3-dev, Copyright (c) 1999-2013, by Zend Technologies

I've run sudo apt-get install php5-curl, as suggested many places, but it still fails with the same error. What's wrong?

Answer 1

According to the documentation there is no class Curl.

Perhaps you forgot to import some class of your own, or of another third-party vendor?