Description:
------------
extension=curl; (is enabled in php.ini)

<?php
	echo '<pre>';
	print_r(get_loaded_extensions());
	echo '</pre>';


Result without curl

Array
(
    [0] => Core
    [1] => bcmath
    [2] => calendar
    [3] => ctype
    [4] => date
    [5] => filter
    [6] => hash
    [7] => iconv
    [8] => json
    [9] => SPL
    [10] => pcre
    [11] => readline
    [12] => Reflection
    [13] => session
    [14] => standard
    [15] => mysqlnd
    [16] => tokenizer
    [17] => zip
    [18] => zlib
    [19] => libxml
    [20] => dom
    [21] => PDO
    [22] => openssl
    [23] => SimpleXML
    [24] => xml
    [25] => xmlreader
    [26] => xmlwriter
    [27] => apache2handler
    [28] => fileinfo
    [29] => gd
    [30] => interbase
    [31] => mbstring
    [32] => exif
    [33] => mysqli
    [34] => Phar
    [35] => PDO_Firebird
    [36] => pdo_mysql
)