Description:
------------
<?php
$data = array(
	'submit' => 'submit',
	'var' => array(1, 2)
);

echo http_build_query($data, '', '&');
?>

That'll output the following:

submit=submit&var%5B0%5D=1&var%5B1%5D=1

It seems like curl_setopt(..., CURLOPT_POSTFIELDS, $data) ought to behave similarly but it doesn't.



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

$data = array(
	'submit' => 'submit',
	'var' => array(1, 2)
);

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, 'http://www.domain.tld/script.php');
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);

echo curl_exec($ch);

Expected result:
----------------
Array
(
    [submit] => submit
    [var] => Array
)

Actual result:
--------------
Array
(
    [submit] => submit
    [var] => Array
        (
            [0] => 1
            [1] => 2
        )

)